Merge pull request #112382 from carlossanlop/release/9.0-staging

[manual] Merge release/9.0-staging into release/9.0

.config/dotnet-tools.json

@@ -15,7 +15,7 @@
       ]
     },
     "microsoft.dotnet.xharness.cli": {
-      "version": "9.0.0-prerelease.25057.1",
+      "version": "9.0.0-prerelease.25103.3",
       "commands": [
         "xharness"
       ]

.github/workflows/check-no-merge-label.yml

@@ -0,0 +1,25 @@
+name: check-no-merge-label
+
+permissions:
+  pull-requests: read
+
+on:
+  pull_request:
+    types: [opened, edited, reopened, labeled, unlabeled, synchronize]
+    branches:
+      - 'main'
+      - 'release/**'
+
+jobs:
+  check-labels:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check 'NO-MERGE' label
+      run: |
+        echo "Merging permission is disabled when the 'NO-MERGE' label is applied."
+        if [ "${{ contains(github.event.pull_request.labels.*.name, 'NO-MERGE') }}" = "false" ]; then
+          exit 0
+        else
+          echo "::error:: The 'NO-MERGE' label was applied to the PR. Merging is disabled."
+          exit 1
+        fi

.github/workflows/check-service-labels.yml

@@ -15,7 +15,7 @@ jobs:
     steps:
     - name: Check 'Servicing-approved' label
       run: |
-        echo "Merging permission is enabled for servicing PRs when the `Servicing-approved` label is applied."
+        echo "Merging permission is enabled for servicing PRs when the 'Servicing-approved' label is applied."
         if [ "${{ contains(github.event.pull_request.labels.*.name, 'Servicing-approved') }}" = "true" ]; then
           exit 0
         else

NuGet.config

@@ -9,11 +9,28 @@
     <clear />
     <!--Begin: Package sources managed by Dependency Flow automation. Do not edit the sources below.-->
     <!--  Begin: Package sources from dotnet-emsdk -->
+    <add key="darc-pub-dotnet-emsdk-4c9d1b1" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-emsdk-4c9d1b11/nuget/v3/index.json" />
     <add key="darc-pub-dotnet-emsdk-dad5528" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-emsdk-dad5528e/nuget/v3/index.json" />
     <add key="darc-pub-dotnet-emsdk-79f708d" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-emsdk-79f708d7/nuget/v3/index.json" />
+    <add key="darc-pub-dotnet-emsdk-2c27e40-15" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-emsdk-2c27e405-15/nuget/v3/index.json" />
+    <add key="darc-pub-dotnet-emsdk-2c27e40-14" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-emsdk-2c27e405-14/nuget/v3/index.json" />
+    <add key="darc-pub-dotnet-emsdk-2c27e40-13" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-emsdk-2c27e405-13/nuget/v3/index.json" />
+    <add key="darc-pub-dotnet-emsdk-2c27e40-12" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-emsdk-2c27e405-12/nuget/v3/index.json" />
+    <add key="darc-pub-dotnet-emsdk-2c27e40-11" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-emsdk-2c27e405-11/nuget/v3/index.json" />
+    <add key="darc-pub-dotnet-emsdk-2c27e40-10" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-emsdk-2c27e405-10/nuget/v3/index.json" />
+    <add key="darc-pub-dotnet-emsdk-2c27e40-9" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-emsdk-2c27e405-9/nuget/v3/index.json" />
+    <add key="darc-pub-dotnet-emsdk-2c27e40-8" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-emsdk-2c27e405-8/nuget/v3/index.json" />
+    <add key="darc-pub-dotnet-emsdk-2c27e40-7" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-emsdk-2c27e405-7/nuget/v3/index.json" />
+    <add key="darc-pub-dotnet-emsdk-2c27e40-6" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-emsdk-2c27e405-6/nuget/v3/index.json" />
+    <add key="darc-pub-dotnet-emsdk-2c27e40-5" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-emsdk-2c27e405-5/nuget/v3/index.json" />
+    <add key="darc-pub-dotnet-emsdk-2c27e40-4" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-emsdk-2c27e405-4/nuget/v3/index.json" />
+    <add key="darc-pub-dotnet-emsdk-2c27e40-3" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-emsdk-2c27e405-3/nuget/v3/index.json" />
+    <add key="darc-pub-dotnet-emsdk-2c27e40-2" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-emsdk-2c27e405-2/nuget/v3/index.json" />
+    <add key="darc-pub-dotnet-emsdk-2c27e40-1" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-emsdk-2c27e405-1/nuget/v3/index.json" />
+    <add key="darc-pub-dotnet-emsdk-2c27e40" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-emsdk-2c27e405/nuget/v3/index.json" />
     <!--  End: Package sources from dotnet-emsdk -->
     <!--  Begin: Package sources from dotnet-sdk -->
-    <add key="darc-pub-dotnet-sdk-a345a00" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-sdk-a345a003/nuget/v3/index.json" />
+    <add key="darc-pub-dotnet-sdk-049799c" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-sdk-049799c3/nuget/v3/index.json" />
     <!--  End: Package sources from dotnet-sdk -->
     <!--End: Package sources managed by Dependency Flow automation. Do not edit the sources above.-->
     <!--

eng/Version.Details.xml

@@ -1,8 +1,8 @@
 <Dependencies>
   <ProductDependencies>
-    <Dependency Name="Microsoft.NETCore.Runtime.ICU.Transport" Version="9.0.0-rtm.25061.1">
+    <Dependency Name="Microsoft.NETCore.Runtime.ICU.Transport" Version="9.0.0-rtm.25105.1">
       <Uri>https://github.com/dotnet/icu</Uri>
-      <Sha>b182bb23c5e7c215495c987f23d2e2f0ed54a1ca</Sha>
+      <Sha>b278d2c5e9fc54c15df9eb5319eb9152f21b5bb9</Sha>
     </Dependency>
     <Dependency Name="System.Net.MsQuic.Transport" Version="9.0.0-alpha.1.24167.3">
       <Uri>https://github.com/dotnet/msquic</Uri>
@@ -54,14 +54,14 @@
       <Sha>803d8598f98fb4efd94604b32627ee9407f246db</Sha>
       <SourceBuild RepoName="command-line-api" ManagedOnly="true" />
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Cecil" Version="0.11.5-alpha.25056.3">
+    <Dependency Name="Microsoft.DotNet.Cecil" Version="0.11.5-alpha.25102.5">
       <Uri>https://github.com/dotnet/cecil</Uri>
-      <Sha>7ea2381200e5ca70cf67efc887d9cd693d82b77f</Sha>
+      <Sha>aa3ae0d49da3cfb31a383f16303a3f2f0c3f1a19</Sha>
     </Dependency>
     <!-- Intermediate is necessary for source build. -->
-    <Dependency Name="Microsoft.SourceBuild.Intermediate.cecil" Version="0.11.5-alpha.25056.3">
+    <Dependency Name="Microsoft.SourceBuild.Intermediate.cecil" Version="0.11.5-alpha.25102.5">
       <Uri>https://github.com/dotnet/cecil</Uri>
-      <Sha>7ea2381200e5ca70cf67efc887d9cd693d82b77f</Sha>
+      <Sha>aa3ae0d49da3cfb31a383f16303a3f2f0c3f1a19</Sha>
       <SourceBuild RepoName="cecil" ManagedOnly="true" />
     </Dependency>
     <Dependency Name="Microsoft.NET.Workload.Emscripten.Current.Manifest-9.0.100.Transport" Version="9.0.3-servicing.25105.2">
@@ -79,9 +79,9 @@
       <SourceBuild RepoName="emsdk" ManagedOnly="true" />
     </Dependency>
     <!-- Intermediate is necessary for source build. -->
-    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-reference-packages" Version="9.0.0-alpha.1.25060.3">
+    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-reference-packages" Version="9.0.0-alpha.1.25081.6">
       <Uri>https://github.com/dotnet/source-build-reference-packages</Uri>
-      <Sha>f5fa796273e4e59926e3fab26e1ab9e7d577f5e5</Sha>
+      <Sha>1cec3b4a8fb07138136a1ca1e04763bfcf7841db</Sha>
       <SourceBuild RepoName="source-build-reference-packages" ManagedOnly="true" />
     </Dependency>
     <!-- Intermediate is necessary for source build. -->
@@ -92,139 +92,139 @@
     </Dependency>
   </ProductDependencies>
   <ToolsetDependencies>
-    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="9.0.0-beta.25058.5">
+    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="9.0.0-beta.25077.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>8cc6ecd76c24ef6665579a5c5e386a211a1e7c54</Sha>
+      <Sha>bac7e1caea791275b7c3ccb4cb75fd6a04a26618</Sha>
     </Dependency>
     <!-- Intermediate is necessary for source build. -->
-    <Dependency Name="Microsoft.SourceBuild.Intermediate.arcade" Version="9.0.0-beta.25058.5">
+    <Dependency Name="Microsoft.SourceBuild.Intermediate.arcade" Version="9.0.0-beta.25077.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>8cc6ecd76c24ef6665579a5c5e386a211a1e7c54</Sha>
+      <Sha>bac7e1caea791275b7c3ccb4cb75fd6a04a26618</Sha>
       <SourceBuild RepoName="arcade" ManagedOnly="true" />
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.XliffTasks" Version="9.0.0-beta.25058.5">
+    <Dependency Name="Microsoft.DotNet.XliffTasks" Version="9.0.0-beta.25077.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>8cc6ecd76c24ef6665579a5c5e386a211a1e7c54</Sha>
+      <Sha>bac7e1caea791275b7c3ccb4cb75fd6a04a26618</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Helix.Sdk" Version="9.0.0-beta.25058.5">
+    <Dependency Name="Microsoft.DotNet.Helix.Sdk" Version="9.0.0-beta.25077.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>8cc6ecd76c24ef6665579a5c5e386a211a1e7c54</Sha>
+      <Sha>bac7e1caea791275b7c3ccb4cb75fd6a04a26618</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.GenAPI" Version="9.0.0-beta.25058.5">
+    <Dependency Name="Microsoft.DotNet.GenAPI" Version="9.0.0-beta.25077.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>8cc6ecd76c24ef6665579a5c5e386a211a1e7c54</Sha>
+      <Sha>bac7e1caea791275b7c3ccb4cb75fd6a04a26618</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.GenFacades" Version="9.0.0-beta.25058.5">
+    <Dependency Name="Microsoft.DotNet.GenFacades" Version="9.0.0-beta.25077.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>8cc6ecd76c24ef6665579a5c5e386a211a1e7c54</Sha>
+      <Sha>bac7e1caea791275b7c3ccb4cb75fd6a04a26618</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.XUnitAssert" Version="2.9.0-beta.25058.5">
+    <Dependency Name="Microsoft.DotNet.XUnitAssert" Version="2.9.0-beta.25077.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>8cc6ecd76c24ef6665579a5c5e386a211a1e7c54</Sha>
+      <Sha>bac7e1caea791275b7c3ccb4cb75fd6a04a26618</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.XUnitExtensions" Version="9.0.0-beta.25058.5">
+    <Dependency Name="Microsoft.DotNet.XUnitExtensions" Version="9.0.0-beta.25077.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>8cc6ecd76c24ef6665579a5c5e386a211a1e7c54</Sha>
+      <Sha>bac7e1caea791275b7c3ccb4cb75fd6a04a26618</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.XUnitConsoleRunner" Version="2.9.0-beta.25058.5">
+    <Dependency Name="Microsoft.DotNet.XUnitConsoleRunner" Version="2.9.0-beta.25077.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>8cc6ecd76c24ef6665579a5c5e386a211a1e7c54</Sha>
+      <Sha>bac7e1caea791275b7c3ccb4cb75fd6a04a26618</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Build.Tasks.Archives" Version="9.0.0-beta.25058.5">
+    <Dependency Name="Microsoft.DotNet.Build.Tasks.Archives" Version="9.0.0-beta.25077.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>8cc6ecd76c24ef6665579a5c5e386a211a1e7c54</Sha>
+      <Sha>bac7e1caea791275b7c3ccb4cb75fd6a04a26618</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Build.Tasks.Packaging" Version="9.0.0-beta.25058.5">
+    <Dependency Name="Microsoft.DotNet.Build.Tasks.Packaging" Version="9.0.0-beta.25077.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>8cc6ecd76c24ef6665579a5c5e386a211a1e7c54</Sha>
+      <Sha>bac7e1caea791275b7c3ccb4cb75fd6a04a26618</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Build.Tasks.Installers" Version="9.0.0-beta.25058.5">
+    <Dependency Name="Microsoft.DotNet.Build.Tasks.Installers" Version="9.0.0-beta.25077.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>8cc6ecd76c24ef6665579a5c5e386a211a1e7c54</Sha>
+      <Sha>bac7e1caea791275b7c3ccb4cb75fd6a04a26618</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Build.Tasks.Templating" Version="9.0.0-beta.25058.5">
+    <Dependency Name="Microsoft.DotNet.Build.Tasks.Templating" Version="9.0.0-beta.25077.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>8cc6ecd76c24ef6665579a5c5e386a211a1e7c54</Sha>
+      <Sha>bac7e1caea791275b7c3ccb4cb75fd6a04a26618</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Build.Tasks.Workloads" Version="9.0.0-beta.25058.5">
+    <Dependency Name="Microsoft.DotNet.Build.Tasks.Workloads" Version="9.0.0-beta.25077.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>8cc6ecd76c24ef6665579a5c5e386a211a1e7c54</Sha>
+      <Sha>bac7e1caea791275b7c3ccb4cb75fd6a04a26618</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.CodeAnalysis" Version="9.0.0-beta.25058.5">
+    <Dependency Name="Microsoft.DotNet.CodeAnalysis" Version="9.0.0-beta.25077.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>8cc6ecd76c24ef6665579a5c5e386a211a1e7c54</Sha>
+      <Sha>bac7e1caea791275b7c3ccb4cb75fd6a04a26618</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Build.Tasks.TargetFramework" Version="9.0.0-beta.25058.5">
+    <Dependency Name="Microsoft.DotNet.Build.Tasks.TargetFramework" Version="9.0.0-beta.25077.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>8cc6ecd76c24ef6665579a5c5e386a211a1e7c54</Sha>
+      <Sha>bac7e1caea791275b7c3ccb4cb75fd6a04a26618</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.RemoteExecutor" Version="9.0.0-beta.25058.5">
+    <Dependency Name="Microsoft.DotNet.RemoteExecutor" Version="9.0.0-beta.25077.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>8cc6ecd76c24ef6665579a5c5e386a211a1e7c54</Sha>
+      <Sha>bac7e1caea791275b7c3ccb4cb75fd6a04a26618</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Build.Tasks.Feed" Version="9.0.0-beta.25058.5">
+    <Dependency Name="Microsoft.DotNet.Build.Tasks.Feed" Version="9.0.0-beta.25077.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>8cc6ecd76c24ef6665579a5c5e386a211a1e7c54</Sha>
+      <Sha>bac7e1caea791275b7c3ccb4cb75fd6a04a26618</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.VersionTools.Tasks" Version="9.0.0-beta.25058.5">
+    <Dependency Name="Microsoft.DotNet.VersionTools.Tasks" Version="9.0.0-beta.25077.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>8cc6ecd76c24ef6665579a5c5e386a211a1e7c54</Sha>
+      <Sha>bac7e1caea791275b7c3ccb4cb75fd6a04a26618</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.SharedFramework.Sdk" Version="9.0.0-beta.25058.5">
+    <Dependency Name="Microsoft.DotNet.SharedFramework.Sdk" Version="9.0.0-beta.25077.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>8cc6ecd76c24ef6665579a5c5e386a211a1e7c54</Sha>
+      <Sha>bac7e1caea791275b7c3ccb4cb75fd6a04a26618</Sha>
     </Dependency>
-    <Dependency Name="System.ComponentModel.TypeConverter.TestData" Version="9.0.0-beta.24517.2">
+    <Dependency Name="System.ComponentModel.TypeConverter.TestData" Version="9.0.0-beta.25071.2">
       <Uri>https://github.com/dotnet/runtime-assets</Uri>
-      <Sha>be3ffb86e48ffd7f75babda38cba492aa058f04f</Sha>
+      <Sha>ceeaaca3ae019d656421fdf49fc2dde5f29c9d09</Sha>
     </Dependency>
-    <Dependency Name="System.Data.Common.TestData" Version="9.0.0-beta.24517.2">
+    <Dependency Name="System.Data.Common.TestData" Version="9.0.0-beta.25071.2">
       <Uri>https://github.com/dotnet/runtime-assets</Uri>
-      <Sha>be3ffb86e48ffd7f75babda38cba492aa058f04f</Sha>
+      <Sha>ceeaaca3ae019d656421fdf49fc2dde5f29c9d09</Sha>
     </Dependency>
-    <Dependency Name="System.Drawing.Common.TestData" Version="9.0.0-beta.24517.2">
+    <Dependency Name="System.Drawing.Common.TestData" Version="9.0.0-beta.25071.2">
       <Uri>https://github.com/dotnet/runtime-assets</Uri>
-      <Sha>be3ffb86e48ffd7f75babda38cba492aa058f04f</Sha>
+      <Sha>ceeaaca3ae019d656421fdf49fc2dde5f29c9d09</Sha>
     </Dependency>
-    <Dependency Name="System.Formats.Tar.TestData" Version="9.0.0-beta.24517.2">
+    <Dependency Name="System.Formats.Tar.TestData" Version="9.0.0-beta.25071.2">
       <Uri>https://github.com/dotnet/runtime-assets</Uri>
-      <Sha>be3ffb86e48ffd7f75babda38cba492aa058f04f</Sha>
+      <Sha>ceeaaca3ae019d656421fdf49fc2dde5f29c9d09</Sha>
     </Dependency>
-    <Dependency Name="System.IO.Compression.TestData" Version="9.0.0-beta.24517.2">
+    <Dependency Name="System.IO.Compression.TestData" Version="9.0.0-beta.25071.2">
       <Uri>https://github.com/dotnet/runtime-assets</Uri>
-      <Sha>be3ffb86e48ffd7f75babda38cba492aa058f04f</Sha>
+      <Sha>ceeaaca3ae019d656421fdf49fc2dde5f29c9d09</Sha>
     </Dependency>
-    <Dependency Name="System.IO.Packaging.TestData" Version="9.0.0-beta.24517.2">
+    <Dependency Name="System.IO.Packaging.TestData" Version="9.0.0-beta.25071.2">
       <Uri>https://github.com/dotnet/runtime-assets</Uri>
-      <Sha>be3ffb86e48ffd7f75babda38cba492aa058f04f</Sha>
+      <Sha>ceeaaca3ae019d656421fdf49fc2dde5f29c9d09</Sha>
     </Dependency>
-    <Dependency Name="System.Net.TestData" Version="9.0.0-beta.24517.2">
+    <Dependency Name="System.Net.TestData" Version="9.0.0-beta.25071.2">
       <Uri>https://github.com/dotnet/runtime-assets</Uri>
-      <Sha>be3ffb86e48ffd7f75babda38cba492aa058f04f</Sha>
+      <Sha>ceeaaca3ae019d656421fdf49fc2dde5f29c9d09</Sha>
     </Dependency>
-    <Dependency Name="System.Private.Runtime.UnicodeData" Version="9.0.0-beta.24517.2">
+    <Dependency Name="System.Private.Runtime.UnicodeData" Version="9.0.0-beta.25071.2">
       <Uri>https://github.com/dotnet/runtime-assets</Uri>
-      <Sha>be3ffb86e48ffd7f75babda38cba492aa058f04f</Sha>
+      <Sha>ceeaaca3ae019d656421fdf49fc2dde5f29c9d09</Sha>
     </Dependency>
-    <Dependency Name="System.Runtime.TimeZoneData" Version="9.0.0-beta.24517.2">
+    <Dependency Name="System.Runtime.TimeZoneData" Version="9.0.0-beta.25071.2">
       <Uri>https://github.com/dotnet/runtime-assets</Uri>
-      <Sha>be3ffb86e48ffd7f75babda38cba492aa058f04f</Sha>
+      <Sha>ceeaaca3ae019d656421fdf49fc2dde5f29c9d09</Sha>
     </Dependency>
-    <Dependency Name="System.Security.Cryptography.X509Certificates.TestData" Version="9.0.0-beta.24517.2">
+    <Dependency Name="System.Security.Cryptography.X509Certificates.TestData" Version="9.0.0-beta.25071.2">
       <Uri>https://github.com/dotnet/runtime-assets</Uri>
-      <Sha>be3ffb86e48ffd7f75babda38cba492aa058f04f</Sha>
+      <Sha>ceeaaca3ae019d656421fdf49fc2dde5f29c9d09</Sha>
     </Dependency>
-    <Dependency Name="System.Text.RegularExpressions.TestData" Version="9.0.0-beta.24517.2">
+    <Dependency Name="System.Text.RegularExpressions.TestData" Version="9.0.0-beta.25071.2">
       <Uri>https://github.com/dotnet/runtime-assets</Uri>
-      <Sha>be3ffb86e48ffd7f75babda38cba492aa058f04f</Sha>
+      <Sha>ceeaaca3ae019d656421fdf49fc2dde5f29c9d09</Sha>
     </Dependency>
-    <Dependency Name="System.Windows.Extensions.TestData" Version="9.0.0-beta.24517.2">
+    <Dependency Name="System.Windows.Extensions.TestData" Version="9.0.0-beta.25071.2">
       <Uri>https://github.com/dotnet/runtime-assets</Uri>
-      <Sha>be3ffb86e48ffd7f75babda38cba492aa058f04f</Sha>
+      <Sha>ceeaaca3ae019d656421fdf49fc2dde5f29c9d09</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.CilStrip.Sources" Version="9.0.0-beta.24517.2">
+    <Dependency Name="Microsoft.DotNet.CilStrip.Sources" Version="9.0.0-beta.25071.2">
       <Uri>https://github.com/dotnet/runtime-assets</Uri>
-      <Sha>be3ffb86e48ffd7f75babda38cba492aa058f04f</Sha>
+      <Sha>ceeaaca3ae019d656421fdf49fc2dde5f29c9d09</Sha>
     </Dependency>
     <Dependency Name="runtime.linux-arm64.Microsoft.NETCore.Runtime.Mono.LLVM.Sdk" Version="19.1.0-alpha.1.24575.1" CoherentParentDependency="Microsoft.NET.Workload.Emscripten.Current.Manifest-9.0.100.Transport">
       <Uri>https://github.com/dotnet/llvm-project</Uri>
@@ -320,21 +320,21 @@
       <Uri>https://github.com/dotnet/runtime</Uri>
       <Sha>b030c4dfdfa1bf287f10f96006619a06bc2000ae</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.XHarness.TestRunners.Common" Version="9.0.0-prerelease.25057.1">
+    <Dependency Name="Microsoft.DotNet.XHarness.TestRunners.Common" Version="9.0.0-prerelease.25103.3">
       <Uri>https://github.com/dotnet/xharness</Uri>
-      <Sha>b19a0fbe866756907e546ed927b013687689b4ee</Sha>
+      <Sha>22a44bd14f5d6308acdda4b6dd67e4d7aa0bca5b</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.XHarness.TestRunners.Xunit" Version="9.0.0-prerelease.25057.1">
+    <Dependency Name="Microsoft.DotNet.XHarness.TestRunners.Xunit" Version="9.0.0-prerelease.25103.3">
       <Uri>https://github.com/dotnet/xharness</Uri>
-      <Sha>b19a0fbe866756907e546ed927b013687689b4ee</Sha>
+      <Sha>22a44bd14f5d6308acdda4b6dd67e4d7aa0bca5b</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.XHarness.CLI" Version="9.0.0-prerelease.25057.1">
+    <Dependency Name="Microsoft.DotNet.XHarness.CLI" Version="9.0.0-prerelease.25103.3">
       <Uri>https://github.com/dotnet/xharness</Uri>
-      <Sha>b19a0fbe866756907e546ed927b013687689b4ee</Sha>
+      <Sha>22a44bd14f5d6308acdda4b6dd67e4d7aa0bca5b</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.PackageTesting" Version="9.0.0-beta.25058.5">
+    <Dependency Name="Microsoft.DotNet.PackageTesting" Version="9.0.0-beta.25077.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>8cc6ecd76c24ef6665579a5c5e386a211a1e7c54</Sha>
+      <Sha>bac7e1caea791275b7c3ccb4cb75fd6a04a26618</Sha>
     </Dependency>
     <Dependency Name="optimization.windows_nt-x64.MIBC.Runtime" Version="1.0.0-prerelease.24462.2">
       <Uri>https://dev.azure.com/dnceng/internal/_git/dotnet-optimization</Uri>
@@ -352,48 +352,48 @@
       <Uri>https://dev.azure.com/dnceng/internal/_git/dotnet-optimization</Uri>
       <Sha>9d7532585ce71e30ab55f0364d3cecccaf0775d1</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.HotReload.Utils.Generator.BuildTool" Version="9.0.0-alpha.0.25057.3">
+    <Dependency Name="Microsoft.DotNet.HotReload.Utils.Generator.BuildTool" Version="9.0.0-alpha.0.25077.3">
       <Uri>https://github.com/dotnet/hotreload-utils</Uri>
-      <Sha>0c557eb70fff0d39a63cb18d386e0c52bbfa9cab</Sha>
+      <Sha>fe67b0da4c0a7e82f0f9a4da1cb966c730e6934f</Sha>
     </Dependency>
-    <Dependency Name="System.Runtime.Numerics.TestData" Version="9.0.0-beta.24517.2">
+    <Dependency Name="System.Runtime.Numerics.TestData" Version="9.0.0-beta.25071.2">
       <Uri>https://github.com/dotnet/runtime-assets</Uri>
-      <Sha>be3ffb86e48ffd7f75babda38cba492aa058f04f</Sha>
+      <Sha>ceeaaca3ae019d656421fdf49fc2dde5f29c9d09</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.Net.Compilers.Toolset" Version="4.12.0-3.24631.1">
+    <Dependency Name="Microsoft.Net.Compilers.Toolset" Version="4.12.0-3.25105.5">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>da7c6c4257b2f661024b9a506773372a09023eee</Sha>
+      <Sha>25acc509a1cb1d1a4923b0091cbc5ce837b024d0</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis" Version="4.12.0-3.24631.1">
+    <Dependency Name="Microsoft.CodeAnalysis" Version="4.12.0-3.25105.5">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>da7c6c4257b2f661024b9a506773372a09023eee</Sha>
+      <Sha>25acc509a1cb1d1a4923b0091cbc5ce837b024d0</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.CSharp" Version="4.12.0-3.24631.1">
+    <Dependency Name="Microsoft.CodeAnalysis.CSharp" Version="4.12.0-3.25105.5">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>da7c6c4257b2f661024b9a506773372a09023eee</Sha>
+      <Sha>25acc509a1cb1d1a4923b0091cbc5ce837b024d0</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.Analyzers" Version="3.11.0-beta1.24629.2">
+    <Dependency Name="Microsoft.CodeAnalysis.Analyzers" Version="3.11.0-beta1.25076.3">
       <Uri>https://github.com/dotnet/roslyn-analyzers</Uri>
-      <Sha>5bfaf6aea5cf9d1c924d9adc69916eac3be07880</Sha>
+      <Sha>16865ea61910500f1022ad2b96c499e5df02c228</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.NetAnalyzers" Version="9.0.0-preview.24629.2">
+    <Dependency Name="Microsoft.CodeAnalysis.NetAnalyzers" Version="9.0.0-preview.25076.3">
       <Uri>https://github.com/dotnet/roslyn-analyzers</Uri>
-      <Sha>5bfaf6aea5cf9d1c924d9adc69916eac3be07880</Sha>
+      <Sha>16865ea61910500f1022ad2b96c499e5df02c228</Sha>
     </Dependency>
     <!-- Intermediate is necessary for source build. -->
-    <Dependency Name="Microsoft.SourceBuild.Intermediate.roslyn" Version="4.12.0-3.24631.1">
+    <Dependency Name="Microsoft.SourceBuild.Intermediate.roslyn" Version="4.12.0-3.25105.5">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>da7c6c4257b2f661024b9a506773372a09023eee</Sha>
+      <Sha>25acc509a1cb1d1a4923b0091cbc5ce837b024d0</Sha>
       <SourceBuild RepoName="roslyn" ManagedOnly="true" />
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.ApiCompat.Task" Version="9.0.102">
+    <Dependency Name="Microsoft.DotNet.ApiCompat.Task" Version="9.0.103">
       <Uri>https://github.com/dotnet/sdk</Uri>
-      <Sha>a345a00343aa14a693aec75a3d56fc07e99e517f</Sha>
+      <Sha>049799c39d766c58ef6388865d5f5ed273b6a75e</Sha>
     </Dependency>
     <!-- Intermediate is necessary for source build. -->
-    <Dependency Name="Microsoft.SourceBuild.Intermediate.sdk" Version="9.0.102-servicing.24610.2">
+    <Dependency Name="Microsoft.SourceBuild.Intermediate.sdk" Version="9.0.103-servicing.25065.25">
       <Uri>https://github.com/dotnet/sdk</Uri>
-      <Sha>a345a00343aa14a693aec75a3d56fc07e99e517f</Sha>
+      <Sha>049799c39d766c58ef6388865d5f5ed273b6a75e</Sha>
       <SourceBuild RepoName="sdk" ManagedOnly="true" />
     </Dependency>
     <Dependency Name="optimization.windows_nt-arm64.MIBC.Runtime" Version="1.0.0-prerelease.24462.2">

eng/Versions.props

@@ -36,17 +36,17 @@
   </ItemGroup>
   <PropertyGroup>
     <!-- dotnet/roslyn-analyzers dependencies -->
-    <MicrosoftCodeAnalysisAnalyzersVersion>3.11.0-beta1.24629.2</MicrosoftCodeAnalysisAnalyzersVersion>
+    <MicrosoftCodeAnalysisAnalyzersVersion>3.11.0-beta1.25076.3</MicrosoftCodeAnalysisAnalyzersVersion>
-    <MicrosoftCodeAnalysisNetAnalyzersVersion>9.0.0-preview.24629.2</MicrosoftCodeAnalysisNetAnalyzersVersion>
+    <MicrosoftCodeAnalysisNetAnalyzersVersion>9.0.0-preview.25076.3</MicrosoftCodeAnalysisNetAnalyzersVersion>
     <!-- dotnet/roslyn dependencies -->
     <!--
       These versions should not be used by any project that contributes to the design-time experience in VS, such as an analyzer, code-fix, or generator assembly.
       Any tools that contribute to the design-time experience should use the MicrosoftCodeAnalysisVersion_LatestVS property above to ensure
       they do not break the local dev experience.
     -->
-    <MicrosoftCodeAnalysisCSharpVersion>4.12.0-3.24631.1</MicrosoftCodeAnalysisCSharpVersion>
+    <MicrosoftCodeAnalysisCSharpVersion>4.12.0-3.25105.5</MicrosoftCodeAnalysisCSharpVersion>
-    <MicrosoftCodeAnalysisVersion>4.12.0-3.24631.1</MicrosoftCodeAnalysisVersion>
+    <MicrosoftCodeAnalysisVersion>4.12.0-3.25105.5</MicrosoftCodeAnalysisVersion>
-    <MicrosoftNetCompilersToolsetVersion>4.12.0-3.24631.1</MicrosoftNetCompilersToolsetVersion>
+    <MicrosoftNetCompilersToolsetVersion>4.12.0-3.25105.5</MicrosoftNetCompilersToolsetVersion>
   </PropertyGroup>
   <!--
     For source generator support we need to target multiple versions of Roslyn in order to be able to run on older versions of Roslyn.
@@ -83,24 +83,24 @@
   <PropertyGroup>
     <StaticCsVersion>0.2.0</StaticCsVersion>
     <!-- SDK dependencies (also used in wasm build tests -->
-    <MicrosoftDotNetApiCompatTaskVersion>9.0.102</MicrosoftDotNetApiCompatTaskVersion>
+    <MicrosoftDotNetApiCompatTaskVersion>9.0.103</MicrosoftDotNetApiCompatTaskVersion>
     <!-- Arcade dependencies -->
-    <MicrosoftDotNetBuildTasksFeedVersion>9.0.0-beta.25058.5</MicrosoftDotNetBuildTasksFeedVersion>
+    <MicrosoftDotNetBuildTasksFeedVersion>9.0.0-beta.25077.4</MicrosoftDotNetBuildTasksFeedVersion>
-    <MicrosoftDotNetCodeAnalysisVersion>9.0.0-beta.25058.5</MicrosoftDotNetCodeAnalysisVersion>
+    <MicrosoftDotNetCodeAnalysisVersion>9.0.0-beta.25077.4</MicrosoftDotNetCodeAnalysisVersion>
-    <MicrosoftDotNetGenAPIVersion>9.0.0-beta.25058.5</MicrosoftDotNetGenAPIVersion>
+    <MicrosoftDotNetGenAPIVersion>9.0.0-beta.25077.4</MicrosoftDotNetGenAPIVersion>
-    <MicrosoftDotNetGenFacadesVersion>9.0.0-beta.25058.5</MicrosoftDotNetGenFacadesVersion>
+    <MicrosoftDotNetGenFacadesVersion>9.0.0-beta.25077.4</MicrosoftDotNetGenFacadesVersion>
-    <MicrosoftDotNetXUnitAssertVersion>2.9.0-beta.25058.5</MicrosoftDotNetXUnitAssertVersion>
+    <MicrosoftDotNetXUnitAssertVersion>2.9.0-beta.25077.4</MicrosoftDotNetXUnitAssertVersion>
-    <MicrosoftDotNetXUnitExtensionsVersion>9.0.0-beta.25058.5</MicrosoftDotNetXUnitExtensionsVersion>
+    <MicrosoftDotNetXUnitExtensionsVersion>9.0.0-beta.25077.4</MicrosoftDotNetXUnitExtensionsVersion>
-    <MicrosoftDotNetXUnitConsoleRunnerVersion>2.9.0-beta.25058.5</MicrosoftDotNetXUnitConsoleRunnerVersion>
+    <MicrosoftDotNetXUnitConsoleRunnerVersion>2.9.0-beta.25077.4</MicrosoftDotNetXUnitConsoleRunnerVersion>
-    <MicrosoftDotNetBuildTasksArchivesVersion>9.0.0-beta.25058.5</MicrosoftDotNetBuildTasksArchivesVersion>
+    <MicrosoftDotNetBuildTasksArchivesVersion>9.0.0-beta.25077.4</MicrosoftDotNetBuildTasksArchivesVersion>
-    <MicrosoftDotNetBuildTasksInstallersVersion>9.0.0-beta.25058.5</MicrosoftDotNetBuildTasksInstallersVersion>
+    <MicrosoftDotNetBuildTasksInstallersVersion>9.0.0-beta.25077.4</MicrosoftDotNetBuildTasksInstallersVersion>
-    <MicrosoftDotNetBuildTasksPackagingVersion>9.0.0-beta.25058.5</MicrosoftDotNetBuildTasksPackagingVersion>
+    <MicrosoftDotNetBuildTasksPackagingVersion>9.0.0-beta.25077.4</MicrosoftDotNetBuildTasksPackagingVersion>
-    <MicrosoftDotNetBuildTasksTargetFrameworkVersion>9.0.0-beta.25058.5</MicrosoftDotNetBuildTasksTargetFrameworkVersion>
+    <MicrosoftDotNetBuildTasksTargetFrameworkVersion>9.0.0-beta.25077.4</MicrosoftDotNetBuildTasksTargetFrameworkVersion>
-    <MicrosoftDotNetBuildTasksTemplatingVersion>9.0.0-beta.25058.5</MicrosoftDotNetBuildTasksTemplatingVersion>
+    <MicrosoftDotNetBuildTasksTemplatingVersion>9.0.0-beta.25077.4</MicrosoftDotNetBuildTasksTemplatingVersion>
-    <MicrosoftDotNetBuildTasksWorkloadsPackageVersion>9.0.0-beta.25058.5</MicrosoftDotNetBuildTasksWorkloadsPackageVersion>
+    <MicrosoftDotNetBuildTasksWorkloadsPackageVersion>9.0.0-beta.25077.4</MicrosoftDotNetBuildTasksWorkloadsPackageVersion>
-    <MicrosoftDotNetRemoteExecutorVersion>9.0.0-beta.25058.5</MicrosoftDotNetRemoteExecutorVersion>
+    <MicrosoftDotNetRemoteExecutorVersion>9.0.0-beta.25077.4</MicrosoftDotNetRemoteExecutorVersion>
-    <MicrosoftDotNetVersionToolsTasksVersion>9.0.0-beta.25058.5</MicrosoftDotNetVersionToolsTasksVersion>
+    <MicrosoftDotNetVersionToolsTasksVersion>9.0.0-beta.25077.4</MicrosoftDotNetVersionToolsTasksVersion>
-    <MicrosoftDotNetPackageTestingVersion>9.0.0-beta.25058.5</MicrosoftDotNetPackageTestingVersion>
+    <MicrosoftDotNetPackageTestingVersion>9.0.0-beta.25077.4</MicrosoftDotNetPackageTestingVersion>
     <!-- TODO: Remove pinned xunit.analyzers version: https://github.com/dotnet/runtime/issues/97088 -->
     <XUnitAnalyzersVersion>1.4.0</XUnitAnalyzersVersion>
     <!-- NuGet dependencies -->
@@ -141,20 +141,20 @@
     <SystemReflectionMetadataToolsetVersion>8.0.0</SystemReflectionMetadataToolsetVersion>
     <SystemReflectionMetadataLoadContextToolsetVersion>8.0.0</SystemReflectionMetadataLoadContextToolsetVersion>
     <!-- Runtime-Assets dependencies -->
-    <SystemRuntimeNumericsTestDataVersion>9.0.0-beta.24517.2</SystemRuntimeNumericsTestDataVersion>
+    <SystemRuntimeNumericsTestDataVersion>9.0.0-beta.25071.2</SystemRuntimeNumericsTestDataVersion>
-    <SystemComponentModelTypeConverterTestDataVersion>9.0.0-beta.24517.2</SystemComponentModelTypeConverterTestDataVersion>
+    <SystemComponentModelTypeConverterTestDataVersion>9.0.0-beta.25071.2</SystemComponentModelTypeConverterTestDataVersion>
-    <SystemDataCommonTestDataVersion>9.0.0-beta.24517.2</SystemDataCommonTestDataVersion>
+    <SystemDataCommonTestDataVersion>9.0.0-beta.25071.2</SystemDataCommonTestDataVersion>
-    <SystemDrawingCommonTestDataVersion>9.0.0-beta.24517.2</SystemDrawingCommonTestDataVersion>
+    <SystemDrawingCommonTestDataVersion>9.0.0-beta.25071.2</SystemDrawingCommonTestDataVersion>
-    <SystemFormatsTarTestDataVersion>9.0.0-beta.24517.2</SystemFormatsTarTestDataVersion>
+    <SystemFormatsTarTestDataVersion>9.0.0-beta.25071.2</SystemFormatsTarTestDataVersion>
-    <SystemIOCompressionTestDataVersion>9.0.0-beta.24517.2</SystemIOCompressionTestDataVersion>
+    <SystemIOCompressionTestDataVersion>9.0.0-beta.25071.2</SystemIOCompressionTestDataVersion>
-    <SystemIOPackagingTestDataVersion>9.0.0-beta.24517.2</SystemIOPackagingTestDataVersion>
+    <SystemIOPackagingTestDataVersion>9.0.0-beta.25071.2</SystemIOPackagingTestDataVersion>
-    <SystemNetTestDataVersion>9.0.0-beta.24517.2</SystemNetTestDataVersion>
+    <SystemNetTestDataVersion>9.0.0-beta.25071.2</SystemNetTestDataVersion>
-    <SystemPrivateRuntimeUnicodeDataVersion>9.0.0-beta.24517.2</SystemPrivateRuntimeUnicodeDataVersion>
+    <SystemPrivateRuntimeUnicodeDataVersion>9.0.0-beta.25071.2</SystemPrivateRuntimeUnicodeDataVersion>
-    <SystemRuntimeTimeZoneDataVersion>9.0.0-beta.24517.2</SystemRuntimeTimeZoneDataVersion>
+    <SystemRuntimeTimeZoneDataVersion>9.0.0-beta.25071.2</SystemRuntimeTimeZoneDataVersion>
-    <SystemSecurityCryptographyX509CertificatesTestDataVersion>9.0.0-beta.24517.2</SystemSecurityCryptographyX509CertificatesTestDataVersion>
+    <SystemSecurityCryptographyX509CertificatesTestDataVersion>9.0.0-beta.25071.2</SystemSecurityCryptographyX509CertificatesTestDataVersion>
-    <SystemTextRegularExpressionsTestDataVersion>9.0.0-beta.24517.2</SystemTextRegularExpressionsTestDataVersion>
+    <SystemTextRegularExpressionsTestDataVersion>9.0.0-beta.25071.2</SystemTextRegularExpressionsTestDataVersion>
-    <SystemWindowsExtensionsTestDataVersion>9.0.0-beta.24517.2</SystemWindowsExtensionsTestDataVersion>
+    <SystemWindowsExtensionsTestDataVersion>9.0.0-beta.25071.2</SystemWindowsExtensionsTestDataVersion>
-    <MicrosoftDotNetCilStripSourcesVersion>9.0.0-beta.24517.2</MicrosoftDotNetCilStripSourcesVersion>
+    <MicrosoftDotNetCilStripSourcesVersion>9.0.0-beta.25071.2</MicrosoftDotNetCilStripSourcesVersion>
     <!-- dotnet-optimization dependencies -->
     <optimizationwindows_ntx64MIBCRuntimeVersion>1.0.0-prerelease.24462.2</optimizationwindows_ntx64MIBCRuntimeVersion>
     <optimizationwindows_ntx86MIBCRuntimeVersion>1.0.0-prerelease.24462.2</optimizationwindows_ntx86MIBCRuntimeVersion>
@@ -184,10 +184,10 @@
     <!-- Testing -->
     <MicrosoftNETCoreCoreDisToolsVersion>1.4.0</MicrosoftNETCoreCoreDisToolsVersion>
     <MicrosoftNETTestSdkVersion>17.4.0-preview-20220707-01</MicrosoftNETTestSdkVersion>
-    <MicrosoftDotNetXHarnessTestRunnersCommonVersion>9.0.0-prerelease.25057.1</MicrosoftDotNetXHarnessTestRunnersCommonVersion>
+    <MicrosoftDotNetXHarnessTestRunnersCommonVersion>9.0.0-prerelease.25103.3</MicrosoftDotNetXHarnessTestRunnersCommonVersion>
-    <MicrosoftDotNetXHarnessTestRunnersXunitVersion>9.0.0-prerelease.25057.1</MicrosoftDotNetXHarnessTestRunnersXunitVersion>
+    <MicrosoftDotNetXHarnessTestRunnersXunitVersion>9.0.0-prerelease.25103.3</MicrosoftDotNetXHarnessTestRunnersXunitVersion>
-    <MicrosoftDotNetXHarnessCLIVersion>9.0.0-prerelease.25057.1</MicrosoftDotNetXHarnessCLIVersion>
+    <MicrosoftDotNetXHarnessCLIVersion>9.0.0-prerelease.25103.3</MicrosoftDotNetXHarnessCLIVersion>
-    <MicrosoftDotNetHotReloadUtilsGeneratorBuildToolVersion>9.0.0-alpha.0.25057.3</MicrosoftDotNetHotReloadUtilsGeneratorBuildToolVersion>
+    <MicrosoftDotNetHotReloadUtilsGeneratorBuildToolVersion>9.0.0-alpha.0.25077.3</MicrosoftDotNetHotReloadUtilsGeneratorBuildToolVersion>
     <NUnitVersion>3.12.0</NUnitVersion>
     <NUnit3TestAdapterVersion>4.5.0</NUnit3TestAdapterVersion>
     <CoverletCollectorVersion>6.0.0</CoverletCollectorVersion>
@@ -215,11 +215,11 @@
     <!-- Docs -->
     <MicrosoftPrivateIntellisenseVersion>9.0.0-preview-20241010.1</MicrosoftPrivateIntellisenseVersion>
     <!-- Mono Cecil -->
-    <MicrosoftDotNetCecilVersion>0.11.5-alpha.25056.3</MicrosoftDotNetCecilVersion>
+    <MicrosoftDotNetCecilVersion>0.11.5-alpha.25102.5</MicrosoftDotNetCecilVersion>
     <!-- ILCompiler -->
     <MicrosoftDotNetILCompilerVersion>9.0.0-rtm.24511.16</MicrosoftDotNetILCompilerVersion>
     <!-- ICU -->
-    <MicrosoftNETCoreRuntimeICUTransportVersion>9.0.0-rtm.25061.1</MicrosoftNETCoreRuntimeICUTransportVersion>
+    <MicrosoftNETCoreRuntimeICUTransportVersion>9.0.0-rtm.25105.1</MicrosoftNETCoreRuntimeICUTransportVersion>
     <MicrosoftNETCoreRuntimeICUTransportVersion>9.0.0-rtm.24466.4</MicrosoftNETCoreRuntimeICUTransportVersion>
     <!-- MsQuic -->
     <MicrosoftNativeQuicMsQuicSchannelVersion>2.4.3</MicrosoftNativeQuicMsQuicSchannelVersion>
@@ -263,7 +263,7 @@
     <MicrosoftSymbolStoreVersion>1.0.406601</MicrosoftSymbolStoreVersion>
     <!-- sdk version, for testing workloads -->
     <!--<SdkVersionForWorkloadTesting>$(MicrosoftDotNetApiCompatTaskVersion)</SdkVersionForWorkloadTesting>-->
-    <SdkVersionForWorkloadTesting>9.0.101</SdkVersionForWorkloadTesting>
+    <SdkVersionForWorkloadTesting>9.0.102</SdkVersionForWorkloadTesting>
     <runtimewinx64MicrosoftNETCoreRuntimeWasmNodeTransportPackageVersion>9.0.0-alpha.1.24175.1</runtimewinx64MicrosoftNETCoreRuntimeWasmNodeTransportPackageVersion>
     <EmsdkPackageVersion>$(MicrosoftNETRuntimeEmscriptenVersion)</EmsdkPackageVersion>
     <NodePackageVersion>$(runtimewinx64MicrosoftNETCoreRuntimeWasmNodeTransportPackageVersion)</NodePackageVersion>

eng/common/internal/Tools.csproj

@@ -15,16 +15,6 @@
     <PackageReference Include="Microsoft.DotNet.IBCMerge" Version="$(MicrosoftDotNetIBCMergeVersion)" Condition="'$(UsingToolIbcOptimization)' == 'true'" />
     <PackageReference Include="Drop.App" Version="$(DropAppVersion)" ExcludeAssets="all" Condition="'$(UsingToolVisualStudioIbcTraining)' == 'true'"/>
   </ItemGroup>
-  <PropertyGroup>
-    <RestoreSources></RestoreSources>
-    <RestoreSources Condition="'$(UsingToolIbcOptimization)' == 'true'">
-      https://devdiv.pkgs.visualstudio.com/_packaging/dotnet-core-internal-tooling/nuget/v3/index.json;
-    </RestoreSources>
-    <RestoreSources Condition="'$(UsingToolVisualStudioIbcTraining)' == 'true'">
-      $(RestoreSources);
-      https://devdiv.pkgs.visualstudio.com/_packaging/VS/nuget/v3/index.json;
-    </RestoreSources>
-  </PropertyGroup>
 
   <!-- Repository extensibility point -->
   <Import Project="$(RepositoryEngineeringDir)InternalTools.props" Condition="Exists('$(RepositoryEngineeringDir)InternalTools.props')" />

eng/common/template-guidance.md

@@ -57,7 +57,7 @@ extends:
 
 Note: Multiple outputs are ONLY applicable to 1ES PT publishing (only usable when referencing `templates-official`).
 
-# Development notes
+## Development notes
 
 **Folder / file structure**
 

eng/pipelines/libraries/helix-queues-setup.yml

@@ -127,7 +127,6 @@ jobs:
             - ${{ if ne(parameters.jobParameters.testScope, 'outerloop') }}:
               - (Windows.10.Amd64.ServerRS5.Open)windows.10.amd64.serverrs5.open@mcr.microsoft.com/dotnet-buildtools/prereqs:windowsservercore-ltsc2019-helix-amd64
           - ${{ if or(ne(parameters.jobParameters.isExtraPlatformsBuild, true), eq(parameters.jobParameters.includeAllPlatforms, true)) }}:
-            - Windows.81.Amd64.Open
             - Windows.Amd64.Server2022.Open
             - Windows.11.Amd64.Client.Open
             - ${{ if eq(parameters.jobParameters.testScope, 'outerloop') }}:

eng/pipelines/runtime-ioslike.yml

@@ -4,6 +4,24 @@
 
 trigger: none
 
+# To reduce the load on the pipeline, enable it only for PRs that affect Mono LLVM related code.
+pr:
+  branches:
+    include:
+    - main
+    - release/*.*
+
+  paths:
+    include:
+      - src/mono/mono/mini/aot-*.*
+      - src/mono/mono/mini/llvm-*.*
+      - src/mono/mono/mini/mini-llvm-*.*
+      - src/mono/mono/mini/intrinsics.c
+      - src/mono/mono/mini/simd-*.*
+      - src/mono/mono/mini/decompose.c
+      - src/mono/mono/mini/method-to-ir.c
+      - src/mono/mono/mini/mini.c
+
 variables:
   - template: /eng/pipelines/common/variables.yml
 

eng/pipelines/runtime-llvm.yml

@@ -28,6 +28,24 @@ schedules:
       - main
     always: false # run only if there were changes since the last successful scheduled run.
 
+# To reduce the load on the pipeline, enable it only for PRs that affect Mono LLVM related code.
+pr:
+  branches:
+    include:
+    - main
+    - release/*.*
+
+  paths:
+    include:
+      - src/mono/mono/mini/aot-*.*
+      - src/mono/mono/mini/llvm-*.*
+      - src/mono/mono/mini/mini-llvm-*.*
+      - src/mono/mono/mini/intrinsics.c
+      - src/mono/mono/mini/simd-*.*
+      - src/mono/mono/mini/decompose.c
+      - src/mono/mono/mini/method-to-ir.c
+      - src/mono/mono/mini/mini.c
+
 variables:
   - template: /eng/pipelines/common/variables.yml
 

eng/pipelines/runtime.yml

@@ -926,25 +926,25 @@ extends:
 
       # WASI/WASM
 
-      - template: /eng/pipelines/common/templates/wasm-library-tests.yml
+      # - template: /eng/pipelines/common/templates/wasm-library-tests.yml
-        parameters:
+      #   parameters:
-          platforms:
+      #     platforms:
-            - wasi_wasm
+      #       - wasi_wasm
-            - wasi_wasm_win
+      #       - wasi_wasm_win
-          nameSuffix: '_Smoke'
+      #     nameSuffix: '_Smoke'
-          extraBuildArgs: /p:EnableAggressiveTrimming=true /p:RunWasmSamples=true /p:AotHostArchitecture=x64 /p:AotHostOS=$(_hostedOS)
+      #     extraBuildArgs: /p:EnableAggressiveTrimming=true /p:RunWasmSamples=true /p:AotHostArchitecture=x64 /p:AotHostOS=$(_hostedOS)
-          shouldRunSmokeOnly: true
+      #     shouldRunSmokeOnly: true
-          alwaysRun: ${{ variables.isRollingBuild }}
+      #     alwaysRun: ${{ variables.isRollingBuild }}
-          scenarios:
+      #     scenarios:
-            - WasmTestOnWasmtime
+      #       - WasmTestOnWasmtime
 
-      - template: /eng/pipelines/common/templates/simple-wasm-build-tests.yml
+      # - template: /eng/pipelines/common/templates/simple-wasm-build-tests.yml
-        parameters:
+      #   parameters:
-          platforms:
+      #     platforms:
-            - wasi_wasm
+      #       - wasi_wasm
-            - wasi_wasm_win
+      #       - wasi_wasm_win
-          extraBuildArgs: /p:AotHostArchitecture=x64 /p:AotHostOS=$(_hostedOS)
+      #     extraBuildArgs: /p:AotHostArchitecture=x64 /p:AotHostOS=$(_hostedOS)
-          alwaysRun: ${{ variables.isRollingBuild }}
+      #     alwaysRun: ${{ variables.isRollingBuild }}
 
       #
       # Android devices

eng/testing/scenarios/BuildWasiAppsJobsList.txt

@@ -1,7 +0,0 @@
-Wasi.Build.Tests.InvariantTests
-Wasi.Build.Tests.ILStripTests
-Wasi.Build.Tests.SdkMissingTests
-Wasi.Build.Tests.RuntimeConfigTests
-Wasi.Build.Tests.WasiTemplateTests
-Wasi.Build.Tests.PInvokeTableGeneratorTests
-Wasi.Build.Tests.WasiLibraryModeTests

global.json

@@ -1,16 +1,16 @@
 {
   "sdk": {
-    "version": "9.0.100",
+    "version": "9.0.102",
     "allowPrerelease": true,
     "rollForward": "major"
   },
   "tools": {
-    "dotnet": "9.0.100"
+    "dotnet": "9.0.102"
   },
   "msbuild-sdks": {
-    "Microsoft.DotNet.Arcade.Sdk": "9.0.0-beta.25058.5",
+    "Microsoft.DotNet.Arcade.Sdk": "9.0.0-beta.25077.4",
-    "Microsoft.DotNet.Helix.Sdk": "9.0.0-beta.25058.5",
+    "Microsoft.DotNet.Helix.Sdk": "9.0.0-beta.25077.4",
-    "Microsoft.DotNet.SharedFramework.Sdk": "9.0.0-beta.25058.5",
+    "Microsoft.DotNet.SharedFramework.Sdk": "9.0.0-beta.25077.4",
     "Microsoft.Build.NoTargets": "3.7.0",
     "Microsoft.Build.Traversal": "3.4.0",
     "Microsoft.NET.Sdk.IL": "9.0.0-rtm.24511.16"

src/coreclr/ildasm/dasm.cpp

@@ -1914,7 +1914,7 @@ BYTE* PrettyPrintCABlobValue(PCCOR_SIGNATURE &typePtr,
                 for(n=0; n < numElements; n++)
                 {
                     if(n) appendStr(out," ");
-                    sprintf_s(str, 64, "%.*g", 8, (double)(*((float*)dataPtr)));
+                    sprintf_s(str, 64, "%#.8g", (double)(*((float*)dataPtr)));
                     float df = (float)atof(str);
                     // Must compare as underlying bytes, not floating point otherwise optimizer will
                     // try to enregister and compare 80-bit precision number with 32-bit precision number!!!!
@@ -1933,7 +1933,7 @@ BYTE* PrettyPrintCABlobValue(PCCOR_SIGNATURE &typePtr,
                 {
                     if(n) appendStr(out," ");
                     char *pch;
-                    sprintf_s(str, 64, "%.*g", 17, *((double*)dataPtr));
+                    sprintf_s(str, 64, "%#.17g", *((double*)dataPtr));
                     double df = strtod(str, &pch);
                     // Must compare as underlying bytes, not floating point otherwise optimizer will
                     // try to enregister and compare 80-bit precision number with 64-bit precision number!!!!
@@ -2605,7 +2605,7 @@ void DumpDefaultValue(mdToken tok, __inout __nullterminated char* szString, void
         case ELEMENT_TYPE_R4:
             {
                 char szf[32];
-                sprintf_s(szf, 32, "%.*g", 8, (double)MDDV.m_fltValue);
+                sprintf_s(szf, 32, "%#.8g", (double)MDDV.m_fltValue);
                 float df = (float)atof(szf);
                 // Must compare as underlying bytes, not floating point otherwise optimizer will
                 // try to enregister and compare 80-bit precision number with 32-bit precision number!!!!
@@ -2619,7 +2619,7 @@ void DumpDefaultValue(mdToken tok, __inout __nullterminated char* szString, void
         case ELEMENT_TYPE_R8:
             {
                 char szf[32], *pch;
-                sprintf_s(szf, 32, "%.*g", 17, MDDV.m_dblValue);
+                sprintf_s(szf, 32, "%#.17g", MDDV.m_dblValue);
                 double df = strtod(szf, &pch); //atof(szf);
                 szf[31]=0;
                 // Must compare as underlying bytes, not floating point otherwise optimizer will

src/coreclr/nativeaot/Runtime/unix/unixasmmacrosamd64.inc

@@ -16,15 +16,6 @@
 
 .macro NESTED_END Name, Section
         LEAF_END \Name, \Section
-#if defined(__APPLE__)
-        .set LOCAL_LABEL(\Name\()_Size), . - C_FUNC(\Name)
-        .section __LD,__compact_unwind,regular,debug
-        .quad C_FUNC(\Name)
-        .long LOCAL_LABEL(\Name\()_Size)
-        .long 0x04000000 # DWARF
-        .quad 0
-        .quad 0
-#endif
 .endm
 
 .macro PATCH_LABEL Name

src/coreclr/pal/inc/unixasmmacrosamd64.inc

@@ -16,15 +16,6 @@
 
 .macro NESTED_END Name, Section
         LEAF_END \Name, \Section
-#if defined(__APPLE__)
-        .set LOCAL_LABEL(\Name\()_Size), . - C_FUNC(\Name)
-        .section __LD,__compact_unwind,regular,debug
-        .quad C_FUNC(\Name)
-        .long LOCAL_LABEL(\Name\()_Size)
-        .long 0x04000000 # DWARF
-        .quad 0
-        .quad 0
-#endif
 .endm
 
 .macro PATCH_LABEL Name

src/coreclr/vm/prestub.cpp

@@ -1445,11 +1445,18 @@ namespace
 
         DWORD declArgCount;
         IfFailThrow(CorSigUncompressData_EndPtr(pSig1, pEndSig1, &declArgCount));
-
-        // UnsafeAccessors for fields require return types be byref.
-        // This was explicitly checked in TryGenerateUnsafeAccessor().
         if (pSig1 >= pEndSig1)
             ThrowHR(META_E_BAD_SIGNATURE);
+
+        // UnsafeAccessors for fields require return types be byref. However, we first need to
+        // consume any custom modifiers which are prior to the expected ELEMENT_TYPE_BYREF in
+        // the RetType signature (II.23.2.11).
+        _ASSERTE(state.IgnoreCustomModifiers); // We should always ignore custom modifiers for field look-up.
+        MetaSig::ConsumeCustomModifiers(pSig1, pEndSig1);
+        if (pSig1 >= pEndSig1)
+            ThrowHR(META_E_BAD_SIGNATURE);
+
+        // The ELEMENT_TYPE_BYREF was explicitly checked in TryGenerateUnsafeAccessor().
         CorElementType byRefType = CorSigUncompressElementType(pSig1);
         _ASSERTE(byRefType == ELEMENT_TYPE_BYREF);
 

src/coreclr/vm/siginfo.cpp

@@ -3604,7 +3604,7 @@ ErrExit:
 #endif //!DACCESS_COMPILE
 } // CompareTypeTokens
 
-static void ConsumeCustomModifiers(PCCOR_SIGNATURE& pSig, PCCOR_SIGNATURE pEndSig)
+void MetaSig::ConsumeCustomModifiers(PCCOR_SIGNATURE& pSig, PCCOR_SIGNATURE pEndSig)
 {
     mdToken tk;
     CorElementType type;

src/coreclr/vm/siginfo.hpp

@@ -945,6 +945,14 @@ class MetaSig
         //------------------------------------------------------------------
         CorElementType GetByRefType(TypeHandle* pTy) const;
 
+        //------------------------------------------------------------------
+        // Consume the custom modifiers, if any, in the current signature
+        // and update it.
+        // This is a non destructive operation if the current signature is not
+        // pointing at a sequence of ELEMENT_TYPE_CMOD_REQD or ELEMENT_TYPE_CMOD_OPT.
+        //------------------------------------------------------------------
+        static void ConsumeCustomModifiers(PCCOR_SIGNATURE& pSig, PCCOR_SIGNATURE pEndSig);
+
         // Struct used to capture in/out state during the comparison
         // of element types.
         struct CompareState

src/coreclr/vm/threadstatics.cpp

@@ -377,7 +377,7 @@ void FreeLoaderAllocatorHandlesForTLSData(Thread *pThread)
 #endif
         for (const auto& entry : g_pThreadStaticCollectibleTypeIndices->CollectibleEntries())
         {
-            _ASSERTE((entry.TlsIndex.GetIndexOffset() <= pThread->cLoaderHandles) || allRemainingIndicesAreNotValid);
+            _ASSERTE((entry.TlsIndex.GetIndexOffset() >= pThread->cLoaderHandles) || !allRemainingIndicesAreNotValid);
             if (entry.TlsIndex.GetIndexOffset() >= pThread->cLoaderHandles)
             {
 #ifndef _DEBUG
@@ -390,7 +390,9 @@ void FreeLoaderAllocatorHandlesForTLSData(Thread *pThread)
             {
                 if (pThread->pLoaderHandles[entry.TlsIndex.GetIndexOffset()] != (LOADERHANDLE)NULL)
                 {
-                    entry.pMT->GetLoaderAllocator()->FreeHandle(pThread->pLoaderHandles[entry.TlsIndex.GetIndexOffset()]);
+                    LoaderAllocator *pLoaderAllocator = entry.pMT->GetLoaderAllocator();
+                    if (pLoaderAllocator->IsExposedObjectLive())
+                        pLoaderAllocator->FreeHandle(pThread->pLoaderHandles[entry.TlsIndex.GetIndexOffset()]);
                     pThread->pLoaderHandles[entry.TlsIndex.GetIndexOffset()] = (LOADERHANDLE)NULL;
                 }
             }

src/libraries/Common/tests/System/Net/Configuration.Http.cs

@@ -64,9 +64,16 @@ namespace System.Net.Test.Common
                 if (PlatformDetection.IsFirefox)
                 {
                     // https://github.com/dotnet/runtime/issues/101115
-                    return [RemoteEchoServer];
+                    // [ActiveIssue("https://github.com/dotnet/runtime/issues/110578)]
+                    // return [RemoteEchoServer];
+                    return [];
                 }
-                return [RemoteEchoServer, SecureRemoteEchoServer, Http2RemoteEchoServer];
+                return [
+                    // [ActiveIssue("https://github.com/dotnet/runtime/issues/110578)]
+                    // RemoteEchoServer,
+                    SecureRemoteEchoServer,
+                    Http2RemoteEchoServer
+                ];
             }
 
             public static readonly Uri RemoteVerifyUploadServer = new Uri("http://" + Host + "/" + VerifyUploadHandler);
@@ -82,8 +89,20 @@ namespace System.Net.Test.Common
             public static Uri RemoteLoopServer => new Uri("ws://" + RemoteLoopHost + "/" + RemoteLoopHandler);
 
             public static readonly object[][] EchoServers = GetEchoServerList().Select(x => new object[] { x }).ToArray();
-            public static readonly object[][] VerifyUploadServers = { new object[] { RemoteVerifyUploadServer }, new object[] { SecureRemoteVerifyUploadServer }, new object[] { Http2RemoteVerifyUploadServer } };
+            public static readonly object[][] VerifyUploadServers = {
-            public static readonly object[][] CompressedServers = { new object[] { RemoteDeflateServer }, new object[] { RemoteGZipServer }, new object[] { Http2RemoteDeflateServer }, new object[] { Http2RemoteGZipServer } };
+                // [ActiveIssue("https://github.com/dotnet/runtime/issues/110578)]
+                // new object[] { RemoteVerifyUploadServer },
+                new object[] { SecureRemoteVerifyUploadServer },
+                new object[] { Http2RemoteVerifyUploadServer }
+            };
+
+            public static readonly object[][] CompressedServers = {
+                // [ActiveIssue("https://github.com/dotnet/runtime/issues/110578)]
+                // new object[] { RemoteDeflateServer },
+                new object[] { RemoteGZipServer },
+                new object[] { Http2RemoteDeflateServer },
+                new object[] { Http2RemoteGZipServer }
+            };
 
             public static readonly object[][] Http2Servers = { new object[] { new Uri("https://" + Http2Host) } };
             public static readonly object[][] Http2NoPushServers = { new object[] { new Uri("https://" + Http2NoPushHost) } };
@@ -97,9 +116,17 @@ namespace System.Net.Test.Common
                 if (PlatformDetection.IsFirefox)
                 {
                     // https://github.com/dotnet/runtime/issues/101115
-                    return new RemoteServer[] { RemoteHttp11Server };
+                    // [ActiveIssue("https://github.com/dotnet/runtime/issues/110578)]
+                    // return new RemoteServer[] { RemoteHttp11Server };
+                    return [];
                 }
-                return new RemoteServer[] { RemoteHttp11Server, RemoteSecureHttp11Server, RemoteHttp2Server };
+                return new RemoteServer[]
+                {
+                    // [ActiveIssue("https://github.com/dotnet/runtime/issues/110578)]
+                    // RemoteHttp11Server,
+                    RemoteSecureHttp11Server,
+                    RemoteHttp2Server
+                };
             }
 
             public static readonly IEnumerable<object[]> RemoteServersMemberData = GetRemoteServers().Select(s => new object[] { s });

src/libraries/Common/tests/System/Net/Configuration.WebSockets.cs

@@ -28,11 +28,14 @@ namespace System.Net.Test.Common
                 {
                     // https://github.com/dotnet/runtime/issues/101115
                     return new object[][] {
-                        new object[] { RemoteEchoServer },
+                        // [ActiveIssue("https://github.com/dotnet/runtime/issues/110578)]
+                        // new object[] { RemoteEchoServer },
+
                     };
                 }
                 return new object[][] {
-                    new object[] { RemoteEchoServer },
+                    // [ActiveIssue("https://github.com/dotnet/runtime/issues/110578)]
+                    // new object[] { RemoteEchoServer },
                     new object[] { SecureRemoteEchoServer },
                 };
             }
@@ -43,11 +46,13 @@ namespace System.Net.Test.Common
                 {
                     // https://github.com/dotnet/runtime/issues/101115
                     return new object[][] {
-                        new object[] { RemoteEchoHeadersServer },
+                        // [ActiveIssue("https://github.com/dotnet/runtime/issues/110578)]
+                        // new object[] { RemoteEchoHeadersServer },
                     };
                 }
                 return new object[][] {
-                    new object[] { RemoteEchoHeadersServer },
+                    // [ActiveIssue("https://github.com/dotnet/runtime/issues/110578)]
+                    // new object[] { RemoteEchoHeadersServer },
                     new object[] { SecureRemoteEchoHeadersServer },
                 };
             }

src/libraries/Common/tests/System/Net/Http/HttpClientHandlerTest.RemoteServer.cs

@@ -70,7 +70,7 @@ namespace System.Net.Http.Functional.Tests
             handler.UseDefaultCredentials = false;
             using (HttpClient client = CreateHttpClient(handler))
             {
-                Uri uri = Configuration.Http.RemoteHttp11Server.NegotiateAuthUriForDefaultCreds;
+                Uri uri = Configuration.Http.RemoteSecureHttp11Server.NegotiateAuthUriForDefaultCreds;
                 _output.WriteLine("Uri: {0}", uri);
                 using (HttpResponseMessage response = await client.GetAsync(uri))
                 {
@@ -601,9 +601,9 @@ namespace System.Net.Http.Functional.Tests
         public static IEnumerable<object[]> ExpectContinueVersion()
         {
             return
-                from expect in new bool?[] {true, false, null}
+                from expect in new bool?[] { true, false, null }
-                from version in new Version[] {new Version(1, 0), new Version(1, 1), new Version(2, 0)}
+                from version in new Version[] { new Version(1, 0), new Version(1, 1), new Version(2, 0) }
-                select new object[] {expect, version};
+                select new object[] { expect, version };
         }
 
         [OuterLoop("Uses external servers", typeof(PlatformDetection), nameof(PlatformDetection.LocalEchoServerIsNotAvailable))]
@@ -775,7 +775,8 @@ namespace System.Net.Http.Functional.Tests
             {
                 var request = new HttpRequestMessage(
                     new HttpMethod(method),
-                    serverUri) { Version = UseVersion };
+                    serverUri)
+                { Version = UseVersion };
 
                 using (HttpResponseMessage response = await client.SendAsync(TestAsync, request))
                 {
@@ -801,7 +802,8 @@ namespace System.Net.Http.Functional.Tests
             {
                 var request = new HttpRequestMessage(
                     new HttpMethod(method),
-                    serverUri) { Version = UseVersion };
+                    serverUri)
+                { Version = UseVersion };
                 request.Content = new StringContent(ExpectedContent);
                 using (HttpResponseMessage response = await client.SendAsync(TestAsync, request))
                 {
@@ -980,6 +982,7 @@ namespace System.Net.Http.Functional.Tests
         [OuterLoop("Uses external servers")]
         [Fact]
         [ActiveIssue("https://github.com/dotnet/runtime/issues/55083", TestPlatforms.Browser)]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/110578")]
         public async Task GetAsync_AllowAutoRedirectTrue_RedirectFromHttpToHttps_StatusCodeOK()
         {
             HttpClientHandler handler = CreateHttpClientHandler();
@@ -1064,9 +1067,9 @@ namespace System.Net.Http.Functional.Tests
             handler.MaxAutomaticRedirections = maxHops;
             using (HttpClient client = CreateHttpClient(handler))
             {
-                Task<HttpResponseMessage> t = client.GetAsync(Configuration.Http.RemoteHttp11Server.RedirectUriForDestinationUri(
+                Task<HttpResponseMessage> t = client.GetAsync(Configuration.Http.RemoteSecureHttp11Server.RedirectUriForDestinationUri(
                     statusCode: 302,
-                    destinationUri: Configuration.Http.RemoteHttp11Server.EchoUri,
+                    destinationUri: Configuration.Http.RemoteSecureHttp11Server.EchoUri,
                     hops: hops));
 
                 if (hops <= maxHops)
@@ -1074,7 +1077,7 @@ namespace System.Net.Http.Functional.Tests
                     using (HttpResponseMessage response = await t)
                     {
                         Assert.Equal(HttpStatusCode.OK, response.StatusCode);
-                        Assert.Equal(Configuration.Http.RemoteEchoServer, response.RequestMessage.RequestUri);
+                        Assert.Equal(Configuration.Http.SecureRemoteEchoServer, response.RequestMessage.RequestUri);
                     }
                 }
                 else

src/libraries/Common/tests/System/Net/Http/HttpClientHandlerTest.ServerCertificates.cs

@@ -97,6 +97,7 @@ namespace System.Net.Http.Functional.Tests
 
         [OuterLoop("Uses external servers")]
         [Fact]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/110578")]
         public async Task UseCallback_NotSecureConnection_CallbackNotCalled()
         {
             HttpClientHandler handler = CreateHttpClientHandler();

src/libraries/Common/tests/TestUtilities/System/PlatformDetection.cs

@@ -168,8 +168,8 @@ namespace System
             return !(bool)typeof(LambdaExpression).GetMethod("get_CanCompileToIL").Invoke(null, Array.Empty<object>());
         }
 
-        // Drawing is not supported on non windows platforms in .NET 7.0+.
+        // Drawing is not supported on non windows platforms in .NET 7.0+ and on Mono.
-        public static bool IsDrawingSupported => IsWindows && IsNotWindowsNanoServer && IsNotWindowsServerCore;
+        public static bool IsDrawingSupported => IsWindows && IsNotWindowsNanoServer && IsNotWindowsServerCore && IsNotMonoRuntime;
 
         public static bool IsAsyncFileIOSupported => !IsBrowser && !IsWasi;
 

src/libraries/Microsoft.Bcl.Cryptography/src/System/Security/Cryptography/NetStandardShims.cs

@@ -100,25 +100,14 @@ namespace System.Security.Cryptography
             Span<byte> destination,
             out int bytesWritten)
         {
-            int hashSize = hash.AlgorithmName.Name switch
+            byte[] actual = hash.GetHashAndReset();
-            {
-                nameof(HashAlgorithmName.MD5) => 128 >> 3,
-                nameof(HashAlgorithmName.SHA1) => 160 >> 3,
-                nameof(HashAlgorithmName.SHA256) => 256 >> 3,
-                nameof(HashAlgorithmName.SHA384) => 384 >> 3,
-                nameof(HashAlgorithmName.SHA512) => 512 >> 3,
-                _ => throw new CryptographicException(),
-            };
 
-            if (destination.Length < hashSize)
+            if (destination.Length < actual.Length)
             {
                 bytesWritten = 0;
                 return false;
             }
 
-            byte[] actual = hash.GetHashAndReset();
-            Debug.Assert(actual.Length == hashSize);
-
             actual.AsSpan().CopyTo(destination);
             bytesWritten = actual.Length;
             return true;

src/libraries/System.Formats.Nrbf/tests/ArraySinglePrimitiveRecordTests.cs

@@ -20,7 +20,7 @@ public class ArraySinglePrimitiveRecordTests : ReadTests
 
     public static IEnumerable<object[]> GetCanReadArrayOfAnySizeArgs()
     {
-        foreach (int size in new[] { 1, 127, 128, 512_001, 512_001 })
+        foreach (int size in new[] { 1, 127, 128, 20_001 })
         {
             yield return new object[] { size, true };
             yield return new object[] { size, false };

src/libraries/System.Net.Http.WinHttpHandler/tests/FunctionalTests/ServerCertificateTest.cs

@@ -32,6 +32,7 @@ namespace System.Net.Http.WinHttpHandlerFunctional.Tests
 
         [OuterLoop]
         [Fact]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/110578")]
         public async Task UseCallback_NotSecureConnection_CallbackNotCalled()
         {
             var handler = new WinHttpHandler();

src/libraries/System.Net.Http.WinHttpHandler/tests/FunctionalTests/WinHttpHandlerTest.cs

@@ -55,7 +55,7 @@ namespace System.Net.Http.WinHttpHandlerFunctional.Tests
             string cookieName,
             string cookieValue)
         {
-            Uri uri = System.Net.Test.Common.Configuration.Http.RemoteHttp11Server.RedirectUriForDestinationUri(302, System.Net.Test.Common.Configuration.Http.RemoteEchoServer, 1);
+            Uri uri = System.Net.Test.Common.Configuration.Http.RemoteSecureHttp11Server.RedirectUriForDestinationUri(302, System.Net.Test.Common.Configuration.Http.SecureRemoteEchoServer, 1);
             var handler = new WinHttpHandler();
             handler.WindowsProxyUsePolicy = WindowsProxyUsePolicy.UseWinInetProxy;
             handler.CookieUsePolicy = cookieUsePolicy;

src/libraries/System.Net.Http/tests/FunctionalTests/MetricsTest.cs

@@ -381,7 +381,7 @@ namespace System.Net.Http.Functional.Tests
             using InstrumentRecorder<long> openConnectionsRecorder = SetupInstrumentRecorder<long>(InstrumentNames.OpenConnections);
 
             Uri uri = UseVersion == HttpVersion.Version11
-                ? Test.Common.Configuration.Http.RemoteHttp11Server.EchoUri
+                ? Test.Common.Configuration.Http.RemoteSecureHttp11Server.EchoUri
                 : Test.Common.Configuration.Http.RemoteHttp2Server.EchoUri;
             IPAddress[] addresses = await Dns.GetHostAddressesAsync(uri.Host);
             addresses = addresses.Union(addresses.Select(a => a.MapToIPv6())).ToArray();
@@ -1259,7 +1259,7 @@ namespace System.Net.Http.Functional.Tests
                     });
 
                 }, options: new GenericLoopbackOptions() { UseSsl = true });
-            }, options: new GenericLoopbackOptions() { UseSsl = false});
+            }, options: new GenericLoopbackOptions() { UseSsl = false });
         }
 
         [Fact]

src/libraries/System.Numerics.Tensors/src/System/Numerics/Tensors/netcore/TensorExtensions.cs

@@ -3456,7 +3456,7 @@ namespace System.Numerics.Tensors
             Tensor<T>[] outputs = new Tensor<T>[tensors.Length];
             for (int i = 0; i < tensors.Length; i++)
             {
-                outputs[i] = Tensor.Unsqueeze(tensors[0], dimension);
+                outputs[i] = Tensor.Unsqueeze(tensors[i], dimension);
             }
             return Tensor.ConcatenateOnDimension<T>(dimension, outputs);
         }
@@ -3494,9 +3494,9 @@ namespace System.Numerics.Tensors
             Tensor<T>[] outputs = new Tensor<T>[tensors.Length];
             for (int i = 0; i < tensors.Length; i++)
             {
-                outputs[i] = Tensor.Unsqueeze(tensors[0], dimension);
+                outputs[i] = Tensor.Unsqueeze(tensors[i], dimension);
             }
-            return ref Tensor.ConcatenateOnDimension<T>(dimension, tensors, destination);
+            return ref Tensor.ConcatenateOnDimension<T>(dimension, outputs, destination);
         }
         #endregion
 

src/libraries/System.Numerics.Tensors/tests/TensorTests.cs

@@ -988,6 +988,7 @@ namespace System.Numerics.Tensors.Tests
             Assert.Equal(13, t0[1, 3]);
             Assert.Equal(14, t0[1, 4]);
         }
+
         [Fact]
         public static void TensorStackTests()
         {
@@ -1074,6 +1075,47 @@ namespace System.Numerics.Tensors.Tests
             Assert.Equal(8, resultTensor[1, 3, 1]);
             Assert.Equal(9, resultTensor[1, 4, 0]);
             Assert.Equal(9, resultTensor[1, 4, 1]);
+
+            // stacking 2x2 tensors along dimension 1
+            Tensor<int> v1 = Tensor.Create([1, 2, 3, 4], [2, 2]);
+            Tensor<int> v2 = Tensor.Create([10, 20, 30, 40], [2, 2]);
+            
+            resultTensor = Tensor.StackAlongDimension(1, [v1, v2]);
+            
+            Assert.Equal(3, resultTensor.Rank);
+            Assert.Equal(2, resultTensor.Lengths[0]);
+            Assert.Equal(2, resultTensor.Lengths[1]);
+            Assert.Equal(2, resultTensor.Lengths[2]);
+            
+            Assert.Equal(1, resultTensor[0, 0, 0]);
+            Assert.Equal(2, resultTensor[0, 0, 1]);
+            Assert.Equal(10, resultTensor[0, 1, 0]);
+            Assert.Equal(20, resultTensor[0, 1, 1]);
+            
+            Assert.Equal(3, resultTensor[1, 0, 0]);
+            Assert.Equal(4, resultTensor[1, 0, 1]);
+            Assert.Equal(30, resultTensor[1, 1, 0]);
+            Assert.Equal(40, resultTensor[1, 1, 1]);
+
+            resultTensor = Tensor.StackAlongDimension(0, [v1, v2]);
+
+            Tensor<int> resultTensor2 = Tensor.Create<int>([2, 2, 2]);
+            Tensor.StackAlongDimension([v1, v2], resultTensor2, 1);
+
+            Assert.Equal(3, resultTensor2.Rank);
+            Assert.Equal(2, resultTensor2.Lengths[0]);
+            Assert.Equal(2, resultTensor2.Lengths[1]);
+            Assert.Equal(2, resultTensor2.Lengths[2]);
+
+            Assert.Equal(1, resultTensor2[0, 0, 0]);
+            Assert.Equal(2, resultTensor2[0, 0, 1]);
+            Assert.Equal(10, resultTensor2[0, 1, 0]);
+            Assert.Equal(20, resultTensor2[0, 1, 1]);
+
+            Assert.Equal(3, resultTensor2[1, 0, 0]);
+            Assert.Equal(4, resultTensor2[1, 0, 1]);
+            Assert.Equal(30, resultTensor2[1, 1, 0]);
+            Assert.Equal(40, resultTensor2[1, 1, 1]);
         }
 
         [Fact]

src/libraries/System.Private.Xml/src/System/Xml/Serialization/ReflectionXmlSerializationReader.cs

@@ -1682,6 +1682,11 @@ namespace System.Xml.Serialization
                     {
                         if (member.Source == null && mapping.TypeDesc.IsArrayLike && !(mapping.Elements!.Length == 1 && mapping.Elements[0].Mapping is ArrayMapping))
                         {
+                            // Always create a collection for (non-array) collection-like types, even if the XML data says the collection should be null.
+                            if (!mapping.TypeDesc.IsArray)
+                            {
+                                member.Collection ??= new CollectionMember();
+                            }
                             member.Source = (item) =>
                             {
                                 member.Collection ??= new CollectionMember();
@@ -1694,26 +1699,51 @@ namespace System.Xml.Serialization
 
                     if (member.Source == null)
                     {
+                        var isList = mapping.TypeDesc.IsArrayLike && !mapping.TypeDesc.IsArray;
                         var pi = member.Mapping.MemberInfo as PropertyInfo;
-                        if (pi != null && typeof(IList).IsAssignableFrom(pi.PropertyType)
+
-                            && (pi.SetMethod == null || !pi.SetMethod.IsPublic))
+                        // Here we have to deal with some special cases for property members. The old serializers would trip over
+                        // private property setters generally - except in the case of list-like properties. Because lists get special
+                        // treatment, a private setter for a list property would only be a problem if the default constructor didn't
+                        // already create a list instance for the property. If it does create a list, then the serializer can still
+                        // populate it. Try to emulate the old serializer behavior here.
+
+                        // First, for non-list properties, private setters are always a problem.
+                        if (!isList && pi != null && pi.SetMethod != null && !pi.SetMethod.IsPublic)
                         {
-                            member.Source = (value) =>
+                            member.Source = (value) => throw new InvalidOperationException(SR.Format(SR.XmlReadOnlyPropertyError, pi.Name, pi.DeclaringType!.FullName));
-                            {
-                                var getOnlyList = (IList)pi.GetValue(o)!;
-                                if (value is IList valueList)
-                                {
-                                    foreach (var v in valueList)
-                                    {
-                                        getOnlyList.Add(v);
-                                    }
-                                }
-                                else
-                                {
-                                    getOnlyList.Add(value);
-                                }
-                            };
                         }
+
+                        // Next, for list properties, we need to handle not only the private setter case, but also the case where
+                        // there is no setter at all. Because we need to give the default constructor a chance to create the list
+                        // first before we make noise about not being able to set a list property.
+                        else if (isList && pi != null && (pi.SetMethod == null || !pi.SetMethod.IsPublic))
+                        {
+                            var addMethod = mapping.TypeDesc.Type!.GetMethod("Add");
+
+                            if (addMethod != null)
+                            {
+                                member.Source = (value) =>
+                                {
+                                    var getOnlyList = pi.GetValue(o)!;
+                                    if (getOnlyList == null)
+                                    {
+                                        // No-setter lists should just be ignored if they weren't created by constructor. Private-setter lists are the noisy exception.
+                                        if (pi.SetMethod != null && !pi.SetMethod.IsPublic)
+                                            throw new InvalidOperationException(SR.Format(SR.XmlReadOnlyPropertyError, pi.Name, pi.DeclaringType!.FullName));
+                                    }
+                                    else if (value is IEnumerable valueList)
+                                    {
+                                        foreach (var v in valueList)
+                                        {
+                                            addMethod.Invoke(getOnlyList, new object[] { v });
+                                        }
+                                    }
+                                };
+                            }
+                        }
+
+                        // For all other members (fields, public setter properties, etc), just carry on as normal
                         else
                         {
                             if (member.Mapping.Xmlns != null)
@@ -1729,6 +1759,21 @@ namespace System.Xml.Serialization
                                 member.Source = (value) => setterDelegate(o, value);
                             }
                         }
+
+                        // Finally, special list handling again. ANY list that we can assign/populate should be initialized with
+                        // an empty list if it hasn't been initialized already. Even if the XML data says the list should be null.
+                        // This is an odd legacy behavior, but it's what the old serializers did.
+                        if (isList && member.Source != null)
+                        {
+                            member.EnsureCollection = (obj) =>
+                            {
+                                if (GetMemberValue(obj, mapping.MemberInfo!) == null)
+                                {
+                                    var empty = ReflectionCreateObject(mapping.TypeDesc.Type!);
+                                    member.Source(empty);
+                                }
+                            };
+                        }
                     }
 
                     if (member.Mapping.CheckSpecified == SpecifiedAccessor.ReadWrite)
@@ -1782,23 +1827,29 @@ namespace System.Xml.Serialization
                 WriteAttributes(allMembers, anyAttribute, unknownNodeAction, ref o);
 
                 Reader.MoveToElement();
+
                 if (Reader.IsEmptyElement)
                 {
                     Reader.Skip();
-                    return o;
                 }
-
+                else
-                Reader.ReadStartElement();
-                bool IsSequenceAllMembers = IsSequence();
-                if (IsSequenceAllMembers)
                 {
-                    // https://github.com/dotnet/runtime/issues/1402:
+                    Reader.ReadStartElement();
-                    // Currently the reflection based method treat this kind of type as normal types.
+                    bool IsSequenceAllMembers = IsSequence();
-                    // But potentially we can do some optimization for types that have ordered properties.
+                    if (IsSequenceAllMembers)
+                    {
+                        // https://github.com/dotnet/runtime/issues/1402:
+                        // Currently the reflection based method treat this kind of type as normal types.
+                        // But potentially we can do some optimization for types that have ordered properties.
+                    }
+
+                    WriteMembers(allMembers, unknownNodeAction, unknownNodeAction, anyElementMember, anyTextMember);
+
+                    ReadEndElement();
                 }
 
-                WriteMembers(allMembers, unknownNodeAction, unknownNodeAction, anyElementMember, anyTextMember);
+                // Empty element or not, we need to ensure all our array-like members have been initialized in the same
-
+                // way as the IL / CodeGen - based serializers.
                 foreach (Member member in allMembers)
                 {
                     if (member.Collection != null)
@@ -1810,9 +1861,10 @@ namespace System.Xml.Serialization
                         var setMemberValue = GetSetMemberValueDelegate(o, memberInfo.Name);
                         setMemberValue(o, collection);
                     }
+
+                    member.EnsureCollection?.Invoke(o!);
                 }
 
-                ReadEndElement();
                 return o;
             }
         }
@@ -2090,6 +2142,7 @@ namespace System.Xml.Serialization
             public Action<object?>? CheckSpecifiedSource;
             public Action<object>? ChoiceSource;
             public Action<string, string>? XmlnsSource;
+            public Action<object>? EnsureCollection;
 
             public Member(MemberMapping mapping)
             {

src/libraries/System.Private.Xml/src/System/Xml/Serialization/ReflectionXmlSerializationWriter.cs

@@ -5,6 +5,7 @@ using System.Collections;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
+using System.Globalization;
 using System.Reflection;
 using System.Text;
 using System.Xml.Schema;
@@ -125,7 +126,7 @@ namespace System.Xml.Serialization
             }
             else
             {
-                WriteElements(o, elements, text, choice, writeAccessors, memberTypeDesc.IsNullable);
+                WriteElements(o, choiceSource, elements, text, choice, writeAccessors, memberTypeDesc.IsNullable);
             }
         }
 
@@ -150,11 +151,11 @@ namespace System.Xml.Serialization
                 }
             }
 
-            WriteArrayItems(elements, text, choice, o);
+            WriteArrayItems(elements, text, choice, o, choiceSource);
         }
 
         [RequiresUnreferencedCode("calls WriteElements")]
-        private void WriteArrayItems(ElementAccessor[] elements, TextAccessor? text, ChoiceIdentifierAccessor? choice, object o)
+        private void WriteArrayItems(ElementAccessor[] elements, TextAccessor? text, ChoiceIdentifierAccessor? choice, object o, object? choiceSources)
         {
             var arr = o as IList;
 
@@ -163,7 +164,8 @@ namespace System.Xml.Serialization
                 for (int i = 0; i < arr.Count; i++)
                 {
                     object? ai = arr[i];
-                    WriteElements(ai, elements, text, choice, true, true);
+                    var choiceSource = ((Array?)choiceSources)?.GetValue(i);
+                    WriteElements(ai, choiceSource, elements, text, choice, true, true);
                 }
             }
             else
@@ -174,17 +176,18 @@ namespace System.Xml.Serialization
                 IEnumerator e = a.GetEnumerator();
                 if (e != null)
                 {
+                    int c = 0;
                     while (e.MoveNext())
                     {
                         object ai = e.Current;
-                        WriteElements(ai, elements, text, choice, true, true);
+                        var choiceSource = ((Array?)choiceSources)?.GetValue(c++);
+                        WriteElements(ai, choiceSource, elements, text, choice, true, true);
                     }
                 }
             }
         }
-
         [RequiresUnreferencedCode("calls CreateUnknownTypeException")]
-        private void WriteElements(object? o, ElementAccessor[] elements, TextAccessor? text, ChoiceIdentifierAccessor? choice, bool writeAccessors, bool isNullable)
+        private void WriteElements(object? o, object? choiceSource, ElementAccessor[] elements, TextAccessor? text, ChoiceIdentifierAccessor? choice, bool writeAccessors, bool isNullable)
         {
             if (elements.Length == 0 && text == null)
                 return;
@@ -222,16 +225,35 @@ namespace System.Xml.Serialization
                     }
                     else if (choice != null)
                     {
-                        if (o != null && o.GetType() == element.Mapping!.TypeDesc!.Type)
+                        // This looks heavy - getting names of enums in string form for comparison rather than just comparing values.
+                        // But this faithfully mimics NetFx, and is necessary to prevent confusion between different enum types.
+                        // ie EnumType.ValueX could == 1, but TotallyDifferentEnumType.ValueY could also == 1.
+                        TypeDesc td = element.Mapping!.TypeDesc!;
+                        bool enumUseReflection = choice.Mapping!.TypeDesc!.UseReflection;
+                        string enumTypeName = choice.Mapping!.TypeDesc!.FullName;
+                        string enumFullName = (enumUseReflection ? "" : enumTypeName + ".@") + FindChoiceEnumValue(element, (EnumMapping)choice.Mapping, enumUseReflection);
+                        string choiceFullName = (enumUseReflection ? "" : choiceSource!.GetType().FullName + ".@") + choiceSource!.ToString();
+
+                        if (choiceFullName == enumFullName)
                         {
-                            WriteElement(o, element, writeAccessors);
+                            // Object is either non-null, or it is allowed to be null
-                            return;
+                            if (o != null || (!isNullable || element.IsNullable))
+                            {
+                                // But if Object is non-null, it's got to match types
+                                if (o != null && !td.Type!.IsAssignableFrom(o!.GetType()))
+                                {
+                                    throw CreateMismatchChoiceException(td.FullName, choice.MemberName!, enumFullName);
+                                }
+
+                                WriteElement(o, element, writeAccessors);
+                                return;
+                            }
                         }
                     }
                     else
                     {
                         TypeDesc td = element.IsUnbounded ? element.Mapping!.TypeDesc!.CreateArrayTypeDesc() : element.Mapping!.TypeDesc!;
-                        if (o!.GetType() == td.Type)
+                        if (td.Type!.IsAssignableFrom(o!.GetType()))
                         {
                             WriteElement(o, element, writeAccessors);
                             return;
@@ -280,6 +302,58 @@ namespace System.Xml.Serialization
             }
         }
 
+        private static string FindChoiceEnumValue(ElementAccessor element, EnumMapping choiceMapping, bool useReflection)
+        {
+            string? enumValue = null;
+
+            for (int i = 0; i < choiceMapping.Constants!.Length; i++)
+            {
+                string xmlName = choiceMapping.Constants[i].XmlName;
+
+                if (element.Any && element.Name.Length == 0)
+                {
+                    if (xmlName == "##any:")
+                    {
+                        if (useReflection)
+                            enumValue = choiceMapping.Constants[i].Value.ToString(CultureInfo.InvariantCulture);
+                        else
+                            enumValue = choiceMapping.Constants[i].Name;
+                        break;
+                    }
+                    continue;
+                }
+                int colon = xmlName.LastIndexOf(':');
+                string? choiceNs = colon < 0 ? choiceMapping.Namespace : xmlName.Substring(0, colon);
+                string choiceName = colon < 0 ? xmlName : xmlName.Substring(colon + 1);
+
+                if (element.Name == choiceName)
+                {
+                    if ((element.Form == XmlSchemaForm.Unqualified && string.IsNullOrEmpty(choiceNs)) || element.Namespace == choiceNs)
+                    {
+                        if (useReflection)
+                            enumValue = choiceMapping.Constants[i].Value.ToString(CultureInfo.InvariantCulture);
+                        else
+                            enumValue = choiceMapping.Constants[i].Name;
+                        break;
+                    }
+                }
+            }
+
+            if (string.IsNullOrEmpty(enumValue))
+            {
+                if (element.Any && element.Name.Length == 0)
+                {
+                    // Type {0} is missing enumeration value '##any' for XmlAnyElementAttribute.
+                    throw new InvalidOperationException(SR.Format(SR.XmlChoiceMissingAnyValue, choiceMapping.TypeDesc!.FullName));
+                }
+                // Type {0} is missing value for '{1}'.
+                throw new InvalidOperationException(SR.Format(SR.XmlChoiceMissingValue, choiceMapping.TypeDesc!.FullName, element.Namespace + ":" + element.Name, element.Name, element.Namespace));
+            }
+            if (!useReflection)
+                CodeIdentifier.CheckValidIdentifier(enumValue);
+            return enumValue;
+        }
+
         private void WriteText(object o, TextAccessor text)
         {
             if (text.Mapping is PrimitiveMapping primitiveMapping)
@@ -376,7 +450,7 @@ namespace System.Xml.Serialization
                     if (o != null)
                     {
                         WriteStartElement(name, ns, false);
-                        WriteArrayItems(mapping.ElementsSortedByDerivation!, null, null, o);
+                        WriteArrayItems(mapping.ElementsSortedByDerivation!, null, null, o, null);
                         WriteEndElement();
                     }
                 }

src/libraries/System.Private.Xml/src/System/Xml/Serialization/XmlSerializer.cs

@@ -379,7 +379,6 @@ namespace System.Xml.Serialization
                 }
                 else if (_tempAssembly == null || _typedSerializer)
                 {
-                    // The contion for the block is never true, thus the block is never hit.
                     XmlSerializationWriter writer = CreateWriter();
                     writer.Init(xmlWriter, namespaces == null || namespaces.Count == 0 ? DefaultNamespaces : namespaces, encodingStyle, id);
                     Serialize(o, writer);

src/libraries/System.Private.Xml/tests/XmlSerializer/XmlSerializerTests.RuntimeOnly.cs

@@ -884,6 +884,39 @@ public static partial class XmlSerializerTests
         Assert.Equal(expected.OuterXml, actual.OuterXml);
     }
 
+    [Fact]
+    public static void Xml_TestTypeWithPrivateOrNoSetters()
+    {
+        // Private setters are a problem. Traditional XmlSerializer doesn't know what to do with them.
+        // This should fail when constructing the serializer.
+#if ReflectionOnly
+        // For the moment, the reflection-based serializer doesn't throw until it does deserialization, because
+        // it doesn't do xml/type mapping in the constructor. This should change in the future with improvements to
+        // the reflection-based serializer that frontloads more work to make the actual serialization faster.
+        var ex = Record.Exception(() => SerializeAndDeserialize<TypeWithPrivateSetters>(new TypeWithPrivateSetters(39), "", null, true));
+        ex = AssertTypeAndUnwrap<InvalidOperationException>(ex);
+#else
+        var ex = Record.Exception(() => new XmlSerializer(typeof(TypeWithPrivateSetters)));
+#endif
+        Assert.IsType<InvalidOperationException>(ex);
+        Assert.Equal("Cannot deserialize type 'SerializationTypes.TypeWithPrivateSetters' because it contains property 'PrivateSetter' which has no public setter.", ex.Message);
+
+        // If there is no setter at all though, traditional XmlSerializer just doesn't include the property in the serialization.
+        // Therefore, the following should work. Although the serialized output isn't really worth much.
+        var noSetter = new TypeWithNoSetters(25);
+        var actualNoSetter = SerializeAndDeserialize<TypeWithNoSetters>(noSetter, "<?xml version=\"1.0\"?>\r\n<TypeWithNoSetters xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" />");
+        Assert.NotNull(actualNoSetter);
+        Assert.StrictEqual(25, noSetter.NoSetter);
+        Assert.StrictEqual(200, actualNoSetter.NoSetter); // 200 is what the default constructor sets it to.
+
+        // But private setters aren't a problem if the class is ISerializable.
+        var value = new TypeWithPrivateOrNoSettersButIsIXmlSerializable(32, 52);
+        var actual = SerializeAndDeserialize<TypeWithPrivateOrNoSettersButIsIXmlSerializable>(value, "<?xml version=\"1.0\"?>\r\n<TypeWithPrivateOrNoSettersButIsIXmlSerializable>\r\n  <PrivateSetter>32</PrivateSetter>\r\n  <NoSetter>52</NoSetter>\r\n</TypeWithPrivateOrNoSettersButIsIXmlSerializable>");
+        Assert.NotNull(actual);
+        Assert.StrictEqual(value.PrivateSetter, actual.PrivateSetter);
+        Assert.StrictEqual(value.NoSetter, actual.NoSetter);
+    }
+
     [Fact]
     public static void Xml_TestTypeWithListPropertiesWithoutPublicSetters()
     {
@@ -915,6 +948,7 @@ public static partial class XmlSerializerTests
   <AnotherStringList>
     <string>AnotherFoo</string>
   </AnotherStringList>
+  <AlwaysNullNullableList xsi:nil=""true"" />
 </TypeWithListPropertiesWithoutPublicSetters>");
         Assert.StrictEqual(value.PropertyWithXmlElementAttribute.Count, actual.PropertyWithXmlElementAttribute.Count);
         Assert.Equal(value.PropertyWithXmlElementAttribute[0], actual.PropertyWithXmlElementAttribute[0]);
@@ -928,6 +962,143 @@ public static partial class XmlSerializerTests
         Assert.Equal(value.AnotherStringList[0], actual.AnotherStringList[0]);
         Assert.StrictEqual(value.PublicIntListField[0], actual.PublicIntListField[0]);
         Assert.StrictEqual(value.PublicIntListFieldWithXmlElementAttribute[0], actual.PublicIntListFieldWithXmlElementAttribute[0]);
+        // In an annoyingly inconsistent behavior, if a list property does not have a setter at all, the serializer is smart enough to
+        // not try to set an empty list. So the property will be either empty or null depending on how the default constructor leaves it.
+        Assert.Null(actual.AlwaysNullList);
+        Assert.Null(actual.AlwaysNullNullableList);
+        // Fields are always settable though, so the serializer always takes that liberty. *smh*
+        Assert.Empty(actual.AlwaysNullStringListField);
+        Assert.Empty(actual.AlwaysNullIntListFieldWithXmlElementAttribute);
+
+        // Try with an empty list
+        value = new TypeWithListPropertiesWithoutPublicSetters();
+        actual = SerializeAndDeserialize<TypeWithListPropertiesWithoutPublicSetters>(value,
+@"<?xml version=""1.0""?>
+<TypeWithListPropertiesWithoutPublicSetters xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"" xmlns:xsd=""http://www.w3.org/2001/XMLSchema"">
+    <PublicIntListField />
+    <IntList />
+    <StringList />
+    <AnotherStringList />
+    <AlwaysNullNullableList xsi:nil=""true"" />
+</TypeWithListPropertiesWithoutPublicSetters>");
+        Assert.NotNull(actual);
+        Assert.Empty(actual.PublicIntListField);
+        Assert.Empty(actual.IntList);
+        Assert.Empty(actual.StringList);
+        Assert.Empty(actual.AnotherStringList);
+        Assert.Empty(actual.PropertyWithXmlElementAttribute);
+        // In an annoyingly inconsistent behavior, if a list property does not have a setter at all, the serializer is smart enough to
+        // not try to set an empty list. So the property will be either empty or null depending on how the default constructor leaves it.
+        Assert.Empty(actual.PublicIntListFieldWithXmlElementAttribute);
+        Assert.Null(actual.AlwaysNullList);
+        Assert.Null(actual.AlwaysNullNullableList);
+        // Fields are always settable though, so the serializer always takes that liberty. *smh*
+        Assert.Empty(actual.AlwaysNullStringListField);
+        Assert.Empty(actual.AlwaysNullIntListFieldWithXmlElementAttribute);
+
+        // And also try with a null list
+        value = new TypeWithListPropertiesWithoutPublicSetters(createLists: false);
+        actual = SerializeAndDeserialize<TypeWithListPropertiesWithoutPublicSetters>(value,
+@"<?xml version=""1.0""?>
+<TypeWithListPropertiesWithoutPublicSetters xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"" xmlns:xsd=""http://www.w3.org/2001/XMLSchema"">
+  <StringList xsi:nil=""true"" />
+  <AnotherStringList />
+  <AlwaysNullNullableList xsi:nil=""true"" />
+</TypeWithListPropertiesWithoutPublicSetters>");
+        Assert.NotNull(actual);
+        Assert.Empty(actual.PublicIntListField);
+        Assert.Empty(actual.IntList);
+        Assert.Empty(actual.StringList);
+        Assert.Empty(actual.AnotherStringList);
+        Assert.Empty(actual.PropertyWithXmlElementAttribute);
+        // In an annoyingly inconsistent behavior, if a list property does not have a setter at all, the serializer is smart enough to
+        // not try to set an empty list. So the property will be either empty or null depending on how the default constructor leaves it.
+        Assert.Empty(actual.PublicIntListFieldWithXmlElementAttribute);
+        Assert.Null(actual.AlwaysNullList);
+        Assert.Null(actual.AlwaysNullNullableList);
+        // Fields are always settable though, so the serializer always takes that liberty. *smh*
+        Assert.Empty(actual.AlwaysNullStringListField);
+        Assert.Empty(actual.AlwaysNullIntListFieldWithXmlElementAttribute);
+
+        // And finally, a corner case where "private-setter" property is left null by the default constructor, but the serializer sees it as null
+        // and thinks it can call the private setter, so it tries to make it empty and fails. But again, note that the fields and
+        // no-setter-at-all properties that come first do not cause the failure.
+        var cannotDeserialize = new TypeWithGetOnlyListsThatDoNotInitialize();
+        var ex = Record.Exception(() =>
+        {
+            SerializeAndDeserialize<TypeWithGetOnlyListsThatDoNotInitialize>(cannotDeserialize,
+@"<?xml version=""1.0"" encoding=""UTF-8""?>
+<TypeWithGetOnlyListsThatDoNotInitialize xmlns:xsd=""http://www.w3.org/2001/XMLSchema"" xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance""/>");
+        });
+        ex = AssertTypeAndUnwrap<InvalidOperationException>(ex);
+        // Attempt by method 'Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderTypeWithGetOnlyListsThatDoNotInitialize.Read2_Item(Boolean, Boolean)' to access method 'SerializationTypes.TypeWithGetOnlyListsThatDoNotInitialize.set_AlwaysNullPropertyPrivateSetter(System.Collections.Generic.List`1<Int32>)' failed.
+        Assert.Contains("AlwaysNullPropertyPrivateSetter", ex.Message);
+    }
+
+    [Fact]
+    public static void Xml_HiddenMembersChangeMappings()
+    {
+        var baseValue = new BaseWithElementsAttributesPropertiesAndLists() { StringField = "BString", TextField = "BText", ListField = new () { "one", "two" }, ListProp = new () { "three" } };
+        var baseActual = SerializeAndDeserialize<BaseWithElementsAttributesPropertiesAndLists>(baseValue, "<?xml version=\"1.0\"?>\r\n<BaseWithElementsAttributesPropertiesAndLists xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" TextField=\"BText\">\r\n  <StringField>BString</StringField>\r\n  <ListField>\r\n    <string>one</string>\r\n    <string>two</string>\r\n  </ListField>\r\n  <ListProp>\r\n    <string>three</string>\r\n  </ListProp>\r\n</BaseWithElementsAttributesPropertiesAndLists>");
+        Assert.IsType<BaseWithElementsAttributesPropertiesAndLists>(baseActual);
+        Assert.Equal(baseValue.StringField, baseActual.StringField);
+        Assert.Equal(baseValue.TextField, baseActual.TextField);
+        Assert.Equal(baseValue.ListProp.ToArray(), baseActual.ListProp.ToArray());
+        Assert.Equal(baseValue.ListField.ToArray(), baseActual.ListField.ToArray());
+
+        var value1 = new HideElementWithAttribute() { StringField = "DString" };
+        ((BaseWithElementsAttributesPropertiesAndLists)value1).Copy(baseValue);
+        var ex = Record.Exception(() => { SerializeAndDeserialize<HideElementWithAttribute>(value1, null); });
+        AssertXmlMappingException(ex, "SerializationTypes.HideElementWithAttribute", "StringField", "Member 'HideElementWithAttribute.StringField' hides inherited member 'BaseWithElementsAttributesPropertiesAndLists.StringField', but has different custom attributes.");
+
+        var value2 = new HideAttributeWithElement() { TextField = "DText" };
+        ((BaseWithElementsAttributesPropertiesAndLists)value2).Copy(baseValue);
+        ex = Record.Exception(() => { SerializeAndDeserialize<HideAttributeWithElement>(value2, null); });
+        AssertXmlMappingException(ex, "SerializationTypes.HideAttributeWithElement", "TextField", "Member 'HideAttributeWithElement.TextField' hides inherited member 'BaseWithElementsAttributesPropertiesAndLists.TextField', but has different custom attributes.");
+
+        var value3 = new HideWithNewType() { TextField = 3 };
+        ((BaseWithElementsAttributesPropertiesAndLists)value3).Copy(baseValue);
+        ex = Record.Exception(() => { SerializeAndDeserialize<HideWithNewType>(value3, null); });
+        AssertXmlMappingException(ex, "SerializationTypes.HideWithNewType", "TextField", "Member HideWithNewType.TextField of type System.Int32 hides base class member BaseWithElementsAttributesPropertiesAndLists.TextField of type System.String. Use XmlElementAttribute or XmlAttributeAttribute to specify a new name.");
+
+        var value4 = new HideWithNewName() { StringField = "DString" };
+        ((BaseWithElementsAttributesPropertiesAndLists)value4).Copy(baseValue);
+        ex = Record.Exception(() => { SerializeAndDeserialize<HideWithNewName>(value4, null); });
+        AssertXmlMappingException(ex, "SerializationTypes.HideWithNewName", "StringField", "Member 'HideWithNewName.StringField' hides inherited member 'BaseWithElementsAttributesPropertiesAndLists.StringField', but has different custom attributes.");
+
+        /* This scenario fails before .Net 10 because the process for xml mapping types incorrectly
+         * fails to account for hidden members. In this case, 'ListField' actually gets serialized as
+         * an 'XmlArray' instead of a series of 'XmlElement', because the hidden base-member is an 'XmlArray'.
+         * Let's just skip this scenario. It's live in .Net 10.
+        // Funny tricks can be played with XmlArray/Element when it comes to Lists though.
+        // Stuff kind of doesn't blow up, but hidden members still get left out.
+        var value5 = new HideArrayWithElement() { ListField = new() { "ONE", "TWO", "THREE" } };
+        ((BaseWithElementsAttributesPropertiesAndLists)value5).Copy(baseValue);
+        var actual5 = SerializeAndDeserialize<HideArrayWithElement>(value5,
+@"<?xml version=""1.0""?>
+<HideArrayWithElement xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"" xmlns:xsd=""http://www.w3.org/2001/XMLSchema"" TextField=""BText"">
+  <StringField>BString</StringField>
+  <ListField>ONE</ListField>
+  <ListField>TWO</ListField>
+  <ListField>THREE</ListField>
+  <ListProp>
+    <string>three</string>
+  </ListProp>
+</HideArrayWithElement>");
+        Assert.IsType<HideArrayWithElement>(actual5);
+        Assert.Equal(value5.StringField, actual5.StringField);
+        Assert.Equal(value5.TextField, actual5.TextField);
+        Assert.Equal(value5.ListProp.ToArray(), actual5.ListProp.ToArray());
+        Assert.Equal(value5.ListField.ToArray(), actual5.ListField.ToArray());
+        // Not only are the hidden values not serialized, but the serialzier doesn't even try to do it's empty list thing
+        Assert.Null(((BaseWithElementsAttributesPropertiesAndLists)actual5).ListField);
+        */
+
+        // But at the end of the day, you still can't get away with changing the name of the element
+        var value6 = new HideArrayWithRenamedElement() { ListField = new() { "FOUR", "FIVE" } };
+        ((BaseWithElementsAttributesPropertiesAndLists)value6).Copy(baseValue);
+        ex = Record.Exception(() => { SerializeAndDeserialize<HideArrayWithRenamedElement>(value6, null); });
+        AssertXmlMappingException(ex, "SerializationTypes.HideArrayWithRenamedElement", "ListField", "Member 'HideArrayWithRenamedElement.ListField' hides inherited member 'BaseWithElementsAttributesPropertiesAndLists.ListField', but has different custom attributes.");
     }
 
     [Fact]
@@ -1273,6 +1444,7 @@ public static partial class XmlSerializerTests
         Assert.NotNull(actual.Things);
         Assert.Equal(value.Things.Length, actual.Things.Length);
 
+        // Try with an unexpected namespace
         var expectedElem = (XmlElement)value.Things[1];
         var actualElem = (XmlElement)actual.Things[1];
         Assert.Equal(expectedElem.Name, actualElem.Name);
@@ -1287,6 +1459,26 @@ public static partial class XmlSerializerTests
         };
 
         Assert.Throws<InvalidOperationException>(() => actual = SerializeAndDeserialize(value, string.Empty, skipStringCompare: true));
+
+        // Try with no elements
+        value = new TypeWithMultiNamedXmlAnyElement()
+        {
+            Things = new object[] { }
+        };
+        actual = SerializeAndDeserialize(value,
+           "<?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n<MyXmlType xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" />");
+        Assert.NotNull(actual);
+        Assert.Null(actual.Things);
+
+        // Try with a null list
+        value = new TypeWithMultiNamedXmlAnyElement()
+        {
+            Things = null
+        };
+        actual = SerializeAndDeserialize(value,
+           "<?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n<MyXmlType xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" />");
+        Assert.NotNull(actual);
+        Assert.Null(actual.Things);
     }
 
 
@@ -2531,7 +2723,7 @@ public static partial class XmlSerializerTests
         string ns = s_defaultNs;
         string memberName1 = "items";
         XmlReflectionMember member1 = GetReflectionMemberNoXmlElement<object[]>(memberName1, ns);
-        PropertyInfo itemProperty = typeof(TypeWithPropertyHavingChoice).GetProperty("ManyChoices");
+        FieldInfo itemProperty = typeof(TypeWithArrayPropertyHavingChoice).GetField("ManyChoices");
         member1.XmlAttributes = new XmlAttributes(itemProperty);
 
         string memberName2 = "ChoiceArray";
@@ -2556,6 +2748,202 @@ public static partial class XmlSerializerTests
         Assert.True(items.SequenceEqual(actualItems));
     }
 
+    [Fact]
+    public static void XmlMembersMapping_With_ComplexChoiceIdentifier()
+    {
+        string ns = s_defaultNs;
+        string memberName1 = "items";
+        XmlReflectionMember member1 = GetReflectionMemberNoXmlElement<object[]>(memberName1, ns);
+        FieldInfo itemProperty = typeof(TypeWithPropertyHavingComplexChoice).GetField("ManyChoices");
+        member1.XmlAttributes = new XmlAttributes(itemProperty);
+
+        string memberName2 = "ChoiceArray";
+        XmlReflectionMember member2 = GetReflectionMemberNoXmlElement<MoreChoices[]>(memberName2, ns);
+        member2.XmlAttributes.XmlIgnore = true;
+
+        var members = new XmlReflectionMember[] { member1, member2 };
+
+        object[] items = { new ComplexChoiceB { Name = "Beef" }, 5 };
+        var itemChoices = new MoreChoices[] { MoreChoices.Item, MoreChoices.Amount };
+        object[] value = { items, itemChoices };
+
+        object[] actual = RoundTripWithXmlMembersMapping(value,
+            "<?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n<wrapper xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns=\"http://tempuri.org/\">\r\n  <Item xsi:type=\"ComplexChoiceB\">\r\n    <Name>Beef</Name>\r\n  </Item>\r\n  <Amount>5</Amount>\r\n</wrapper>",
+            false,
+            members,
+            wrapperName: "wrapper");
+
+        Assert.NotNull(actual);
+        var actualItems = actual[0] as object[];
+        Assert.NotNull(actualItems);
+        Assert.True(items.SequenceEqual(actualItems));
+
+        object[] itemsWithNull = { null, 5 };
+        object[] valueWithNull = { itemsWithNull, itemChoices };
+
+        actual = RoundTripWithXmlMembersMapping(valueWithNull,
+            "<?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n<wrapper xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns=\"http://tempuri.org/\">\r\n  <Amount>5</Amount>\r\n</wrapper>",
+            false,
+            members,
+            wrapperName: "wrapper");
+
+        Assert.NotNull(actual);
+        actualItems = actual[0] as object[];
+        // TODO: Ugh. Is losing a 'null' element of the choice array data loss?
+        // Probably. But that's what NetFx and ILGen do. :(
+        Assert.Single(actualItems);
+        Assert.Equal(5, actualItems[0]);
+        Assert.NotNull(actualItems);
+    }
+
+    [Fact]
+    public static void XmlMembersMapping_With_ChoiceErrors()
+    {
+        string ns = s_defaultNs;
+        string memberName1 = "items";
+        XmlReflectionMember member1 = GetReflectionMemberNoXmlElement<object[]>(memberName1, ns);
+        FieldInfo itemProperty = typeof(TypeWithPropertyHavingComplexChoice).GetField("ManyChoices");
+        member1.XmlAttributes = new XmlAttributes(itemProperty);
+
+        string memberName2 = "ChoiceArray";
+        XmlReflectionMember member2 = GetReflectionMemberNoXmlElement<MoreChoices[]>(memberName2, ns);
+        member2.XmlAttributes.XmlIgnore = true;
+
+        var members = new XmlReflectionMember[] { member1, member2 };
+
+        // XmlChoiceMismatchChoiceException
+        object[] items = { new ComplexChoiceB { Name = "Beef" }, "not integer 5" };
+        var itemChoices = new MoreChoices[] { MoreChoices.Item, MoreChoices.Amount };
+        object[] value = { items, itemChoices };
+
+        var ex = Record.Exception(() => {
+            RoundTripWithXmlMembersMapping(value, null, true, members, wrapperName: "wrapper");
+        });
+        ex = AssertTypeAndUnwrap<InvalidOperationException>(ex);
+        Assert.IsType<InvalidOperationException>(ex);
+        Assert.Contains("mismatches the type of ", ex.Message);
+
+        // XmlChoiceMissingValue
+        object[] newItems = { "random string", new ComplexChoiceB { Name = "Beef" }, 5 };
+        object[] newValue = { newItems, itemChoices };
+
+        ex = Record.Exception(() => {
+            RoundTripWithXmlMembersMapping(newValue, null, true, members, wrapperName: "wrapper");
+        });
+        ex = AssertTypeAndUnwrap<InvalidOperationException>(ex);
+        Assert.IsType<InvalidOperationException>(ex);
+        Assert.Contains("Invalid or missing value of the choice identifier", ex.Message);
+
+        // XmlChoiceMissingValue
+        FieldInfo missingItemProperty = typeof(TypeWithPropertyHavingChoiceError).GetField("ManyChoices");
+        member1.XmlAttributes = new XmlAttributes(missingItemProperty);
+
+        object[] missingItems = { new ComplexChoiceB { Name = "Beef" }, 5, "not_a_choice" };
+        var missingItemChoices = new MoreChoices[] { MoreChoices.Item, MoreChoices.Amount, MoreChoices.None };
+        object[] missingValue = { missingItems, missingItemChoices };
+
+        ex = Record.Exception(() => {
+            RoundTripWithXmlMembersMapping(missingValue, null, true, members, wrapperName: "wrapper");
+        });
+        ex = AssertTypeAndUnwrap<InvalidOperationException>(ex);
+        Assert.IsType<InvalidOperationException>(ex);
+        Assert.Contains("is missing enumeration value", ex.Message);
+    }
+
+    [Fact]
+    public static void Xml_TypeWithArrayPropertyHavingChoiceErrors()
+    {
+        MoreChoices[] itemChoices = new MoreChoices[] { MoreChoices.Item, MoreChoices.Amount };
+
+        // XmlChoiceMismatchChoiceException
+        object[] mismatchedChoices = new object[] { new ComplexChoiceB { Name = "Beef" }, "not integer 5" };
+        var mismatchedValue = new TypeWithPropertyHavingComplexChoice() { ManyChoices = mismatchedChoices, ChoiceArray = itemChoices };
+        var ex = Record.Exception(() => {
+            Serialize(mismatchedValue, null);
+        });
+        ex = AssertTypeAndUnwrap<InvalidOperationException>(ex);
+        Assert.IsType<InvalidOperationException>(ex);
+        Assert.Contains("mismatches the type of ", ex.Message);
+
+        // XmlChoiceMissingValue
+        object[] missingChoice = { "random string", new ComplexChoiceB { Name = "Beef" }, 5 };
+        var missingValue = new TypeWithPropertyHavingComplexChoice() { ManyChoices = missingChoice, ChoiceArray = itemChoices };
+        ex = Record.Exception(() => {
+            Serialize(missingValue, null);
+        });
+        ex = AssertTypeAndUnwrap<InvalidOperationException>(ex);
+        Assert.IsType<InvalidOperationException>(ex);
+        Assert.Contains("Invalid or missing value of the choice identifier", ex.Message);
+
+        // XmlChoiceMissingValue
+        object[] invalidChoiceValues = { new ComplexChoiceB { Name = "Beef" }, 5, "not_a_choice" };
+        MoreChoices[] invalidChoices = new MoreChoices[] { MoreChoices.Item, MoreChoices.Amount, MoreChoices.None };
+        var invalidChoiceValue = new TypeWithPropertyHavingChoiceError() { ManyChoices = invalidChoiceValues, ChoiceArray = invalidChoices };
+        ex = Record.Exception(() => {
+            Serialize(invalidChoiceValue, null);
+        });
+#if ReflectionOnly
+        // The ILGen Serializer does XmlMapping during serializer ctor and lets the exception out cleanly.
+        // The Reflection Serializer does XmlMapping in the Serialize() call and wraps the resulting exception
+        //      inside a catch-all IOE in Serialize().
+        ex = AssertTypeAndUnwrap<InvalidOperationException>(ex, "There was an error generating the XML document");
+#endif
+        ex = AssertTypeAndUnwrap<InvalidOperationException>(ex, "TypeWithPropertyHavingChoiceError");   // There was an error reflecting type...
+        ex = AssertTypeAndUnwrap<InvalidOperationException>(ex, "ManyChoices"); // There was an error reflecting field...
+        Assert.IsType<InvalidOperationException>(ex);
+        Assert.Contains("is missing enumeration value", ex.Message);
+    }
+
+    [Fact]
+    public static void Xml_XmlIncludedTypesInTypedCollection()
+    {
+        var value = new List<BaseClass>() {
+            new BaseClass() { Value = "base class" },
+            new DerivedClass() { Value = "derived class" }
+        };
+        var actual = SerializeAndDeserialize<List<BaseClass>>(value,
+@"<?xml version=""1.0"" encoding=""utf-8""?>
+<ArrayOfBaseClass xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"" xmlns:xsd=""http://www.w3.org/2001/XMLSchema"">
+  <BaseClass>
+    <Value>base class</Value>
+  </BaseClass>
+  <BaseClass xsi:type=""DerivedClass"">
+    <Value>derived class</Value>
+  </BaseClass>
+</ArrayOfBaseClass>");
+
+        Assert.NotNull(actual);
+        Assert.Equal(2, actual.Count);
+        Assert.Equal("base class", actual[0].Value);
+        Assert.IsType<BaseClass>(actual[0]);
+        Assert.IsType<DerivedClass>(actual[1]);
+        // BaseClass.Value is hidden - not overridden - by DerivedClass.Value, so it shows when accessed as a BaseClass.
+        Assert.Null(actual[1].Value);
+        Assert.Equal("derived class", ((DerivedClass)actual[1]).Value);
+    }
+
+    [Fact]
+    public static void Xml_XmlIncludedTypesInTypedCollectionSingle()
+    {
+        var value = new List<BaseClass>() {
+            new DerivedClass() { Value = "derived class" }
+        };
+        var actual = SerializeAndDeserialize<List<BaseClass>>(value,
+@"<?xml version=""1.0"" encoding=""utf-8""?>
+<ArrayOfBaseClass xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"" xmlns:xsd=""http://www.w3.org/2001/XMLSchema"">
+  <BaseClass xsi:type=""DerivedClass"">
+    <Value>derived class</Value>
+  </BaseClass>
+</ArrayOfBaseClass>");
+
+        Assert.NotNull(actual);
+        Assert.Single(actual);
+        Assert.IsType<DerivedClass>(actual[0]);
+        // BaseClass.Value is hidden - not overridden - by DerivedClass.Value, so it shows when accessed as a BaseClass.
+        Assert.Null(actual[0].Value);
+        Assert.Equal("derived class", ((DerivedClass)actual[0]).Value);
+    }
+
     [Fact]
     public static void XmlMembersMapping_MultipleMembers()
     {

src/libraries/System.Private.Xml/tests/XmlSerializer/XmlSerializerTests.cs

@@ -161,6 +161,27 @@ string.Format(@"<?xml version=""1.0"" encoding=""utf-8""?>
         Assert.Equal(x.F2, y.F2);
         Utils.Equal<SimpleType>(x.P1, y.P1, (a, b) => { return SimpleType.AreEqual(a, b); });
         Assert.Equal(x.P2, y.P2);
+
+        // Do it again with null and empty arrays
+        x = new TypeWithGetSetArrayMembers
+        {
+            F1 = null,
+            F2 = new int[] { },
+            P1 = new SimpleType[] { },
+            P2 = null
+        };
+        y = SerializeAndDeserialize<TypeWithGetSetArrayMembers>(x,
+@"<?xml version=""1.0""?>
+<TypeWithGetSetArrayMembers xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"" xmlns:xsd=""http://www.w3.org/2001/XMLSchema"">
+  <F2 />
+  <P1 />
+</TypeWithGetSetArrayMembers>");
+
+        Assert.NotNull(y);
+        Assert.Null(y.F1);  // Arrays stay null
+        Assert.Empty(y.F2);
+        Assert.Empty(y.P1);
+        Assert.Null(y.P2);  // Arrays stay null
     }
 
     [Fact]
@@ -172,15 +193,57 @@ string.Format(@"<?xml version=""1.0"" encoding=""utf-8""?>
         x.P2[0] = -1;
         x.P2[1] = 3;
 
-        TypeWithGetOnlyArrayProperties y = SerializeAndDeserialize<TypeWithGetOnlyArrayProperties>(x,
+        TypeWithGetOnlyArrayProperties y = SerializeAndDeserialize<TypeWithGetOnlyArrayProperties>(x, @"<?xml version=""1.0""?><TypeWithGetOnlyArrayProperties xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"" xmlns:xsd=""http://www.w3.org/2001/XMLSchema"" />");
-@"<?xml version=""1.0""?>
-<TypeWithGetOnlyArrayProperties xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"" xmlns:xsd=""http://www.w3.org/2001/XMLSchema"" />");
 
         Assert.NotNull(y);
         // XmlSerializer seems not complain about missing public setter of Array property
         // However, it does not serialize the property. So for this test case, I'll use it to verify there are no complaints about missing public setter
     }
 
+    [Fact]
+    public static void Xml_ArraylikeMembers()
+    {
+        var assertEqual = (TypeWithArraylikeMembers a, TypeWithArraylikeMembers b) => {
+            Assert.Equal(a.IntAField, b.IntAField);
+            Assert.Equal(a.NIntAField, b.NIntAField);
+            Assert.Equal(a.IntLField, b.IntLField);
+            Assert.Equal(a.NIntLField, b.NIntLField);
+            Assert.Equal(a.IntAProp, b.IntAProp);
+            Assert.Equal(a.NIntAProp, b.NIntAProp);
+            Assert.Equal(a.IntLProp, b.IntLProp);
+            Assert.Equal(a.NIntLProp, b.NIntLProp);
+        };
+
+        // Populated array-like members
+        var x = TypeWithArraylikeMembers.CreateWithPopulatedMembers();
+        var y = SerializeAndDeserialize<TypeWithArraylikeMembers>(x, null /* Just checking the input and output objects is good enough here */, null, true);
+        Assert.NotNull(y);
+        assertEqual(x, y);
+
+        // Empty array-like members
+        x = TypeWithArraylikeMembers.CreateWithEmptyMembers();
+        y = SerializeAndDeserialize<TypeWithArraylikeMembers>(x, "<?xml version=\"1.0\"?><TypeWithArraylikeMembers xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\">\r\n  <IntAField />\r\n  <NIntAField />\r\n  <IntLField />\r\n  <NIntLField />\r\n  <IntAProp />\r\n  <NIntAProp />\r\n  <IntLProp />\r\n  <NIntLProp />\r\n</TypeWithArraylikeMembers>");
+        Assert.NotNull(y);
+        assertEqual(x, y);
+        Assert.Empty(y.IntAField);  // Check on a couple fields to be sure they are empty and not null.
+        Assert.Empty(y.NIntLProp);
+
+        // Null array-like members
+        // Null arrays and collections are omitted from xml output (or set to 'nil'). But they differ in deserialization.
+        // Null arrays are deserialized as null as expected. Null collections are unintuitively deserialized as empty collections. This behavior is preserved for compatibility with NetFx.
+        x = TypeWithArraylikeMembers.CreateWithNullMembers();
+        y = SerializeAndDeserialize<TypeWithArraylikeMembers>(x, "<?xml version=\"1.0\"?><TypeWithArraylikeMembers xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\">\r\n  <NIntLField xsi:nil=\"true\" />\r\n  <NIntAProp xsi:nil=\"true\" />\r\n</TypeWithArraylikeMembers>");
+        Assert.NotNull(y);
+        Assert.Null(y.IntAField);
+        Assert.Null(y.NIntAField);
+        Assert.Empty(y.IntLField);
+        Assert.Empty(y.NIntLField);
+        Assert.Null(y.IntAProp);
+        Assert.Null(y.NIntAProp);
+        Assert.Empty(y.IntLProp);
+        Assert.Empty(y.NIntLProp);
+    }
+
     [Fact]
     public static void Xml_ListRoot()
     {
@@ -198,10 +261,10 @@ string.Format(@"<?xml version=""1.0"" encoding=""utf-8""?>
         Assert.Equal((string)x[1], (string)y[1]);
     }
 
-// ROC and Immutable types are not types from 'SerializableAssembly.dll', so they were not included in the
+    // ROC and Immutable types are not types from 'SerializableAssembly.dll', so they were not included in the
-// pregenerated serializers for the sgen tests. We could wrap them in a type that does exist there...
+    // pregenerated serializers for the sgen tests. We could wrap them in a type that does exist there...
-// but I think the RO/Immutable story is wonky enough and RefEmit vs Reflection is near enough on the
+    // but I think the RO/Immutable story is wonky enough and RefEmit vs Reflection is near enough on the
-// horizon that it's not worth the trouble.
+    // horizon that it's not worth the trouble.
 #if !XMLSERIALIZERGENERATORTESTS
     [Fact]
     [ActiveIssue("https://github.com/dotnet/runtime/issues/74247", TestPlatforms.tvOS)]
@@ -455,7 +518,42 @@ string.Format(@"<?xml version=""1.0"" encoding=""utf-8""?>
         Assert.StrictEqual(value.DateTimeProperty, actual.DateTimeProperty);
         Assert.StrictEqual(value.IntProperty, actual.IntProperty);
         Assert.Equal(value.StringProperty, actual.StringProperty);
+        // Before .Net 10, the process for xml mapping types incorrectly maps members closest to the base class,
+        // rather than the most derived class. This isn't a problem for ILGen or source-gen serialziers, since
+        // they emit code that essentially says "o.problemMember = value;" and since 'o' is the derived type, it
+        // just works. But when setting that member via reflection with a MemberInfo, the serializer needs
+        // the MemberInfo from the correct level, and this isn't fixed until .Net 10. So the ILGen and
+        // the reflection-based serializers will produce different results here.
+#if ReflectionOnly
+        Assert.Empty(actual.ListProperty);
+#else
         Assert.Equal(value.ListProperty.ToArray(), actual.ListProperty.ToArray());
+#endif
+
+        BaseClassWithSamePropertyName castAsBase = (BaseClassWithSamePropertyName)actual;
+        Assert.Equal(default(int), castAsBase.IntProperty);
+        Assert.Null(castAsBase.StringProperty);
+        Assert.Null(castAsBase.ListProperty);
+
+        // Try again with a null list to ensure the correct property is deserialized to an empty list
+        value = new DerivedClassWithSameProperty() { DateTimeProperty = new DateTime(100), IntProperty = 5, StringProperty = "TestString", ListProperty = null };
+        actual = SerializeAndDeserialize<DerivedClassWithSameProperty>(value,
+@"<?xml version=""1.0""?>
+<DerivedClassWithSameProperty xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"" xmlns:xsd=""http://www.w3.org/2001/XMLSchema"">
+  <StringProperty>TestString</StringProperty>
+  <IntProperty>5</IntProperty>
+  <DateTimeProperty>0001-01-01T00:00:00.00001</DateTimeProperty>
+</DerivedClassWithSameProperty>");
+
+        Assert.StrictEqual(value.DateTimeProperty, actual.DateTimeProperty);
+        Assert.StrictEqual(value.IntProperty, actual.IntProperty);
+        Assert.Equal(value.StringProperty, actual.StringProperty);
+        Assert.Empty(actual.ListProperty.ToArray());
+
+        castAsBase = (BaseClassWithSamePropertyName)actual;
+        Assert.Equal(default(int), castAsBase.IntProperty);
+        Assert.Null(castAsBase.StringProperty);
+        Assert.Null(castAsBase.ListProperty);
     }
 
     [Fact]
@@ -1088,7 +1186,7 @@ string.Format(@"<?xml version=""1.0"" encoding=""utf-8""?>
             ms.Position = 0;
             string nl = Environment.NewLine;
             string actualFormatting = new StreamReader(ms).ReadToEnd();
-            string expectedFormatting = $"<?xml version=\"1.0\" encoding=\"utf-8\"?>{nl}<SimpleType xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\">{nl}  <P1>foo</P1>{nl}  <P2>1</P2>{ nl}</SimpleType>";
+            string expectedFormatting = $"<?xml version=\"1.0\" encoding=\"utf-8\"?>{nl}<SimpleType xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\">{nl}  <P1>foo</P1>{nl}  <P2>1</P2>{nl}</SimpleType>";
             Assert.Equal(expectedFormatting, actualFormatting);
         }
     }
@@ -1115,7 +1213,64 @@ string.Format(@"<?xml version=""1.0"" encoding=""utf-8""?>
         Assert.StrictEqual(value.DateTimeProperty, actual.DateTimeProperty);
         Assert.StrictEqual(value.IntProperty, actual.IntProperty);
         Assert.Equal(value.StringProperty, actual.StringProperty);
+        // Before .Net 10, the process for xml mapping types incorrectly maps members closest to the base class,
+        // rather than the most derived class. This isn't a problem for ILGen or source-gen serialziers, since
+        // they emit code that essentially says "o.problemMember = value;" and since 'o' is the derived type, it
+        // just works. But when setting that member via reflection with a MemberInfo, the serializer needs
+        // the MemberInfo from the correct level, and this isn't fixed until .Net 10. So the ILGen and
+        // the reflection-based serializers will produce different results here.
+#if ReflectionOnly
+        Assert.Empty(actual.ListProperty);
+#else
         Assert.Equal(value.ListProperty.ToArray(), actual.ListProperty.ToArray());
+#endif
+
+        // All base properties have been hidden, so they should be default here in the base class
+        BaseClassWithSamePropertyName castAsBase = (BaseClassWithSamePropertyName)actual;
+        Assert.StrictEqual(default(DateTime), castAsBase.DateTimeProperty);
+        Assert.StrictEqual(default(int), castAsBase.IntProperty);
+        Assert.Null(castAsBase.StringProperty);
+        Assert.Null(castAsBase.ListProperty);
+
+        // IntProperty and StringProperty are not hidden in Derived2, so they should be set here in the middle
+        DerivedClassWithSameProperty castAsMiddle = (DerivedClassWithSameProperty)actual;
+        Assert.StrictEqual(value.IntProperty, castAsMiddle.IntProperty);
+        Assert.Equal(value.StringProperty, castAsMiddle.StringProperty);
+        // The other properties should be default
+        Assert.StrictEqual(default(DateTime), castAsMiddle.DateTimeProperty);
+        Assert.Null(castAsMiddle.ListProperty);
+
+
+        // Try again with a null list to ensure the correct property is deserialized to an empty list
+        value = new DerivedClassWithSameProperty2() { DateTimeProperty = new DateTime(100, DateTimeKind.Utc), IntProperty = 5, StringProperty = "TestString", ListProperty = null };
+
+        actual = SerializeAndDeserialize(value,
+@"<?xml version=""1.0""?>
+<DerivedClassWithSameProperty2 xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"" xmlns:xsd=""http://www.w3.org/2001/XMLSchema"">
+  <StringProperty>TestString</StringProperty>
+  <IntProperty>5</IntProperty>
+  <DateTimeProperty>0001-01-01T00:00:00.00001Z</DateTimeProperty>
+</DerivedClassWithSameProperty2>");
+
+        Assert.StrictEqual(value.DateTimeProperty, actual.DateTimeProperty);
+        Assert.StrictEqual(value.IntProperty, actual.IntProperty);
+        Assert.Equal(value.StringProperty, actual.StringProperty);
+        Assert.Empty(actual.ListProperty.ToArray());
+
+        // All base properties have been hidden, so they should be default here in the base class
+        castAsBase = (BaseClassWithSamePropertyName)actual;
+        Assert.StrictEqual(default(DateTime), castAsBase.DateTimeProperty);
+        Assert.StrictEqual(default(int), castAsBase.IntProperty);
+        Assert.Null(castAsBase.StringProperty);
+        Assert.Null(castAsBase.ListProperty);
+
+        // IntProperty and StringProperty are not hidden in Derived2, so they should be set here in the middle
+        castAsMiddle = (DerivedClassWithSameProperty)actual;
+        Assert.StrictEqual(value.IntProperty, castAsMiddle.IntProperty);
+        Assert.Equal(value.StringProperty, castAsMiddle.StringProperty);
+        // The other properties should be default
+        Assert.StrictEqual(default(DateTime), castAsMiddle.DateTimeProperty);
+        Assert.Null(castAsMiddle.ListProperty);
     }
 
     [Fact]
@@ -1382,6 +1537,30 @@ string.Format(@"<?xml version=""1.0"" encoding=""utf-8""?>
         Assert.NotNull(actual.ManyChoices);
         Assert.Equal(value.ManyChoices.Length, actual.ManyChoices.Length);
         Assert.True(Enumerable.SequenceEqual(value.ManyChoices, actual.ManyChoices));
+
+        // Try again with a null array
+        value = new TypeWithArrayPropertyHavingChoice() { ManyChoices = null, ChoiceArray = itemChoices };
+        actual = SerializeAndDeserialize(value, "<?xml version=\"1.0\"?><TypeWithArrayPropertyHavingChoice xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" />");
+        Assert.NotNull(actual);
+        Assert.Null(actual.ManyChoices);   // Arrays keep null-ness
+    }
+
+    [Fact]
+    public static void Xml_TypeWithArrayPropertyHavingComplexChoice()
+    {
+        object[] choices = new object[] { new ComplexChoiceB { Name = "Beef" }, 5 };
+
+        // For each item in the choices array, add an enumeration value.
+        MoreChoices[] itemChoices = new MoreChoices[] { MoreChoices.Item, MoreChoices.Amount };
+
+        var value = new TypeWithPropertyHavingComplexChoice() { ManyChoices = choices, ChoiceArray = itemChoices };
+
+        var actual = SerializeAndDeserialize(value, "<?xml version=\"1.0\"?>\r\n<TypeWithPropertyHavingComplexChoice xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\">\r\n  <Item xsi:type=\"ComplexChoiceB\">\r\n    <Name>Beef</Name>\r\n  </Item>\r\n  <Amount>5</Amount>\r\n</TypeWithPropertyHavingComplexChoice>");
+
+        Assert.NotNull(actual);
+        Assert.NotNull(actual.ManyChoices);
+        Assert.Equal(value.ManyChoices.Length, actual.ManyChoices.Length);
+        Assert.True(Enumerable.SequenceEqual(value.ManyChoices, actual.ManyChoices));
     }
 
     [Fact]
@@ -1588,6 +1767,54 @@ string.Format(@"<?xml version=""1.0"" encoding=""utf-8""?>
         Assert.Equal(value.value, ((DerivedClass)actual).value);
     }
 
+    [Fact]
+    public static void Xml_XmlIncludedTypesInCollection()
+    {
+        var value = new MyList() {
+            new BaseClass() { Value = "base class" },
+            new DerivedClass() { Value = "derived class" }
+        };
+        var actual = SerializeAndDeserialize<MyList>(value,
+@"<?xml version=""1.0"" encoding=""utf-8""?>
+<ArrayOfAnyType xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"" xmlns:xsd=""http://www.w3.org/2001/XMLSchema"">
+  <anyType xsi:type=""BaseClass"">
+    <Value>base class</Value>
+  </anyType>
+  <anyType xsi:type=""DerivedClass"">
+    <Value>derived class</Value>
+  </anyType>
+</ArrayOfAnyType>",
+() => { return new XmlSerializer(typeof(MyList), new Type[] { typeof(BaseClass) }); });
+
+        Assert.NotNull(actual);
+        Assert.Equal(2, actual.Count);
+        Assert.IsType<BaseClass>(actual[0]);
+        Assert.Equal("base class", ((BaseClass)actual[0]).Value);
+        Assert.IsType<DerivedClass>(actual[1]);
+        Assert.Equal("derived class", ((DerivedClass)actual[1]).Value);
+    }
+
+    [Fact]
+    public static void Xml_XmlIncludedTypesInCollectionSingle()
+    {
+        var value = new MyList() {
+            new DerivedClass() { Value = "derived class" }
+        };
+        var actual = SerializeAndDeserialize<MyList>(value,
+@"<?xml version=""1.0"" encoding=""utf-8""?>
+<ArrayOfAnyType xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"" xmlns:xsd=""http://www.w3.org/2001/XMLSchema"">
+  <anyType xsi:type=""DerivedClass"">
+    <Value>derived class</Value>
+  </anyType>
+</ArrayOfAnyType>",
+() => { return new XmlSerializer(typeof(MyList), new Type[] { typeof(BaseClass) }); });
+
+        Assert.NotNull(actual);
+        Assert.Single(actual);
+        Assert.IsType<DerivedClass>(actual[0]);
+        Assert.Equal("derived class", ((DerivedClass)actual[0]).Value);
+    }
+
     [Fact]
     public static void Xml_NullRefInXmlSerializerCtorTest()
     {
@@ -2379,6 +2606,32 @@ string.Format(@"<?xml version=""1.0"" encoding=""utf-8""?>
         }
     }
 
+    private static Exception AssertTypeAndUnwrap<T>(object exception, string? message = null) where T : Exception
+    {
+        Assert.IsType<T>(exception);
+        var ex = exception as Exception;
+        if (message != null)
+            Assert.Contains(message, ex.Message);
+        Assert.NotNull(ex.InnerException);
+        return ex.InnerException;
+    }
+
+    private static void AssertXmlMappingException(Exception exception, string typeName, string fieldName, string msg = null)
+    {
+        var ex = exception;
+#if ReflectionOnly
+        // The ILGen Serializer does XmlMapping during serializer ctor and lets the exception out cleanly.
+        // The Reflection Serializer does XmlMapping in the Serialize() call and wraps the resulting exception
+        //      inside a catch-all IOE in Serialize().
+        ex = AssertTypeAndUnwrap<InvalidOperationException>(ex, "There was an error generating the XML document");
+#endif
+        ex = AssertTypeAndUnwrap<InvalidOperationException>(ex, $"There was an error reflecting type '{typeName}'");
+        ex = AssertTypeAndUnwrap<InvalidOperationException>(ex, $"There was an error reflecting field '{fieldName}'");
+        Assert.IsType<InvalidOperationException>(ex);
+        if (msg != null)
+            Assert.Contains(msg, ex.Message);
+    }
+
     private static string Serialize<T>(T value, string baseline, Func<XmlSerializer> serializerFactory = null,
     bool skipStringCompare = false, XmlSerializerNamespaces xns = null)
     {

src/libraries/System.Runtime.Serialization.Xml/tests/SerializationTypes.RuntimeOnly.cs

@@ -1463,6 +1463,92 @@ namespace SerializationTypes
         }
     }
 
+    public class TypeWithPrivateSetters
+    {
+        public TypeWithPrivateSetters() : this(100) { }
+        public TypeWithPrivateSetters(int privateSetter)
+        {
+            PrivateSetter = privateSetter;
+        }
+
+        public int PrivateSetter { get; private set; }
+    }
+
+    public class TypeWithNoSetters
+    {
+        public TypeWithNoSetters() : this(200) { }
+        public TypeWithNoSetters(int noSetter)
+        {
+            NoSetter = noSetter;
+        }
+
+        [XmlElement]
+        public int NoSetter { get; }
+    }
+
+    public class TypeWithPrivateOrNoSettersButIsIXmlSerializable : IXmlSerializable
+    {
+        private int _noSetter;
+        public int PrivateSetter { get; private set; }
+        public int NoSetter { get => _noSetter; }
+
+        // Default constructor
+        public TypeWithPrivateOrNoSettersButIsIXmlSerializable() : this(150, 250) { }
+
+        public TypeWithPrivateOrNoSettersButIsIXmlSerializable(int privateSetter, int noSetter)
+        {
+            PrivateSetter = privateSetter;
+            _noSetter = noSetter;
+        }
+
+        // Implement the IXmlSerializable methods
+        public System.Xml.Schema.XmlSchema GetSchema() => null;
+        public void ReadXml(System.Xml.XmlReader reader)
+        {
+            reader.MoveToContent();
+            if (reader.IsEmptyElement)
+            {
+                reader.ReadStartElement();
+                return;
+            }
+
+            reader.ReadStartElement();
+            while (reader.NodeType != System.Xml.XmlNodeType.EndElement)
+            {
+                if (reader.NodeType == System.Xml.XmlNodeType.Element)
+                {
+                    switch (reader.Name)
+                    {
+                        case nameof(PrivateSetter):
+                            PrivateSetter = reader.ReadElementContentAsInt();
+                            break;
+                        case nameof(NoSetter):
+                            _noSetter = reader.ReadElementContentAsInt();
+                            break;
+                        default:
+                            reader.Skip();
+                            break;
+                    }
+                }
+                else
+                {
+                    reader.Skip();
+                }
+            }
+            reader.ReadEndElement();
+        }
+        public void WriteXml(System.Xml.XmlWriter writer)
+        {
+            writer.WriteStartElement(nameof(PrivateSetter));
+            writer.WriteValue(PrivateSetter);
+            writer.WriteEndElement();
+
+            writer.WriteStartElement(nameof(NoSetter));
+            writer.WriteValue(NoSetter);
+            writer.WriteEndElement();
+        }
+    }
+
     public class TypeWithListPropertiesWithoutPublicSetters
     {
         private List<string> _anotherStringList = new List<string>();
@@ -1472,31 +1558,114 @@ namespace SerializationTypes
             StaticProperty = "Static property should not be checked for public setter";
         }
 
-        public TypeWithListPropertiesWithoutPublicSetters()
+        public TypeWithListPropertiesWithoutPublicSetters() : this(true) { }
+        public TypeWithListPropertiesWithoutPublicSetters(bool createLists)
         {
-            PropertyWithXmlElementAttribute = new List<string>();
+            if (createLists)
-            IntList = new MyGenericList<int>();
+            {
-            StringList = new List<string>();
+                PropertyWithXmlElementAttribute = new List<string>();
-            PrivateIntListField = new List<int>();
+                IntList = new MyGenericList<int>();
-            PublicIntListField = new List<int>();
+                StringList = new List<string>();
-            PublicIntListFieldWithXmlElementAttribute = new List<int>();
+                PrivateIntListField = new List<int>();
+                PublicIntListField = new List<int>();
+                PublicIntListFieldWithXmlElementAttribute = new List<int>();
+            }
         }
 
         public static string StaticProperty { get; private set; }
 
-
+        // Try some things with list properties
         [XmlElement("PropWithXmlElementAttr")]
         public List<string> PropertyWithXmlElementAttribute { get; private set; }
         public MyGenericList<int> IntList { get; private set; }
+        [XmlArray(IsNullable = true)]
         public List<string> StringList { get; private set; }
         public List<string> AnotherStringList { get { return _anotherStringList; } }
 
+        // Try some things with null lists
+        public List<int> AlwaysNullList { get; }
+        [XmlArray(IsNullable = true)]
+        public List<int> AlwaysNullNullableList { get; }
+        [XmlElement("FieldWithXmlElementAttrAlwaysNull")]
+        public List<int> AlwaysNullIntListFieldWithXmlElementAttribute;
+        public List<string> AlwaysNullStringListField;
+
+        // Try some things with list fields
         private List<int> PrivateIntListField;
         public List<int> PublicIntListField;
         [XmlElement("FieldWithXmlElementAttr")]
         public List<int> PublicIntListFieldWithXmlElementAttribute;
     }
 
+    public class TypeWithGetOnlyListsThatDoNotInitialize
+    {
+        // XmlSerializer always tries to make lists empty when deserializing. Some of these are ok, some will cause failures.
+        // Order matters.
+
+        // A field won't cause deserialization to fail since fields are always settable.
+        public List<string> AlwaysNullField;
+
+        // And the serializer is smart enough to leave a setter-less property alone.
+        public List<int> AlwaysNullPropertyNoSetter { get; }
+
+        // But a property with a private setter will cause deserialization to fail.
+        public List<int> AlwaysNullPropertyPrivateSetter { get; private set; }
+    }
+
+    public class BaseWithElementsAttributesPropertiesAndLists
+    {
+        public void Copy(BaseWithElementsAttributesPropertiesAndLists b)
+        {
+            StringField = b.StringField;
+            TextField = b.TextField;
+            ListProp = b.ListProp;
+            ListField = b.ListField;
+        }
+
+        [XmlElement]
+        public string StringField;
+
+        [XmlAttribute]
+        public string TextField;
+
+        [XmlArray]
+        public virtual List<string> ListProp { get; set; }
+
+        [XmlArray]
+        public List<string> ListField;
+    }
+
+    public class HideElementWithAttribute : BaseWithElementsAttributesPropertiesAndLists
+    {
+        [XmlAttribute]
+        public new string StringField;
+    }
+    public class HideAttributeWithElement : BaseWithElementsAttributesPropertiesAndLists
+    {
+        [XmlElement]
+        public new string TextField;
+    }
+    public class HideWithNewType : BaseWithElementsAttributesPropertiesAndLists
+    {
+        [XmlElement]
+        public new int TextField;
+    }
+    public class HideWithNewName : BaseWithElementsAttributesPropertiesAndLists
+    {
+        [XmlAttribute("NewStringField")]
+        public new string StringField;
+    }
+    public class HideArrayWithElement : BaseWithElementsAttributesPropertiesAndLists
+    {
+        [XmlElement]
+        public new List<string> ListField;
+    }
+    public class HideArrayWithRenamedElement : BaseWithElementsAttributesPropertiesAndLists
+    {
+        [XmlElement("NewListField")]
+        public new List<string> ListField;
+    }
+
     public abstract class HighScoreManager<T> where T : HighScoreManager<T>.HighScoreBase
     {
         public abstract class HighScoreBase
@@ -2049,15 +2218,16 @@ namespace SerializationTypes
         public int IntField;
     }
 
-    public class TypeWithPropertyHavingChoice
+    public class TypeWithPropertyHavingChoiceError
     {
         // The ManyChoices field can contain an array
         // of choices. Each choice must be matched to
         // an array item in the ChoiceArray field.
         [XmlChoiceIdentifier("ChoiceArray")]
-        [XmlElement("Item", typeof(string))]
+        [XmlElement("Item", typeof(ComplexChoiceA))]
         [XmlElement("Amount", typeof(int))]
-        public object[] ManyChoices { get; set; }
+        [XmlElement("NotAChoice", typeof(string))]
+        public object[] ManyChoices;
 
         // TheChoiceArray field contains the enumeration
         // values, one for each item in the ManyChoices array.

src/libraries/System.Runtime.Serialization.Xml/tests/SerializationTypes.cs

@@ -89,6 +89,58 @@ namespace SerializationTypes
         }
     }
 
+    public class TypeWithArraylikeMembers
+    {
+        public int[] IntAField;
+        public int[]? NIntAField;
+
+        public List<int> IntLField;
+        [XmlArray(IsNullable = true)]
+        public List<int>? NIntLField;
+
+        public int[] IntAProp { get; set; }
+        [XmlArray(IsNullable = true)]
+        public int[]? NIntAProp { get; set; }
+
+        public List<int> IntLProp { get; set; }
+        public List<int>? NIntLProp { get; set; }
+
+        private static Random r = new Random();
+        public static TypeWithArraylikeMembers CreateWithPopulatedMembers() => new TypeWithArraylikeMembers
+        {
+            IntAField = new int[] { r.Next(), r.Next(), r.Next() },
+            NIntAField = new int[] { r.Next(), r.Next() },
+            IntLField = new List<int> { r.Next() },
+            NIntLField = new List<int> { r.Next(), r.Next() },
+            IntAProp = new int[] { r.Next(), r.Next() },
+            NIntAProp = new int[] { r.Next(), r.Next(), r.Next() },
+            IntLProp = new List<int> { r.Next(), r.Next(), r.Next() },
+            NIntLProp = new List<int> { r.Next() },
+        };
+        public static TypeWithArraylikeMembers CreateWithEmptyMembers() => new TypeWithArraylikeMembers
+        {
+            IntAField = new int[] { },
+            NIntAField = new int[] { },
+            IntLField = new List<int> { },
+            NIntLField = new List<int> { },
+            IntAProp = new int[] { },
+            NIntAProp = new int[] { },
+            IntLProp = new List<int> { },
+            NIntLProp = new List<int> { },
+        };
+        public static TypeWithArraylikeMembers CreateWithNullMembers() => new TypeWithArraylikeMembers
+        {
+            IntAField = null,
+            NIntAField = null,
+            IntLField = null,
+            NIntLField = null,
+            IntAProp = null,
+            NIntAProp = null,
+            IntLProp = null,
+            NIntLProp = null,
+        };
+    }
+
     public struct StructNotSerializable
     {
         public int value;
@@ -829,13 +881,51 @@ namespace SerializationTypes
         public MoreChoices[] ChoiceArray;
     }
 
+    public class TypeWithPropertyHavingComplexChoice
+    {
+        // The ManyChoices field can contain an array
+        // of choices. Each choice must be matched to
+        // an array item in the ChoiceArray field.
+        [XmlChoiceIdentifier("ChoiceArray")]
+        [XmlElement("Item", typeof(ComplexChoiceA))]
+        [XmlElement("Amount", typeof(int))]
+        public object[] ManyChoices;
+
+        // TheChoiceArray field contains the enumeration
+        // values, one for each item in the ManyChoices array.
+        [XmlIgnore]
+        public MoreChoices[] ChoiceArray;
+    }
+
     public enum MoreChoices
     {
         None,
-        Item,
+        Item = 12,
-        Amount
+        Amount = 27
     }
 
+    [XmlInclude(typeof(ComplexChoiceB))]
+    public class ComplexChoiceA
+    {
+        public string Name { get; set; }
+
+        public override bool Equals(object? obj)
+        {
+            if (obj is ComplexChoiceA a)
+            {
+                return a.Name == Name;
+            }
+            return base.Equals(obj);
+        }
+
+        public override int GetHashCode()
+        {
+            //return HashCode.Combine(Name);
+            return Name.GetHashCode();
+        }
+    }
+    public class ComplexChoiceB : ComplexChoiceA { }
+
     public class TypeWithFieldsOrdered
     {
         [XmlElement(Order = 0)]

src/libraries/System.Runtime/tests/System.Globalization.Tests/CultureInfo/CultureInfoCurrentCulture.cs

@@ -44,6 +44,15 @@ namespace System.Globalization.Tests
             Assert.NotEqual(CultureInfo.CurrentUICulture, CultureInfo.InvariantCulture);
         }
 
+        [Fact]
+        [PlatformSpecific(TestPlatforms.OSX | TestPlatforms.iOS | TestPlatforms.MacCatalyst | TestPlatforms.tvOS)]
+        [SkipOnPlatform(TestPlatforms.iOS | TestPlatforms.MacCatalyst | TestPlatforms.tvOS, "https://github.com/dotnet/runtime/issues/111501")]
+        public void CurrentCulture_Default_Is_Specific()
+        {
+            // On OSX-like platforms, the current culture taken from default system culture should be specific.
+            Assert.False(CultureInfo.CurrentCulture.IsNeutralCulture);
+        }
+
         [Fact]
         public void CurrentCulture_Set_Null_ThrowsArgumentNullException()
         {

src/mono/mono.proj

@@ -818,8 +818,8 @@ JS_ENGINES = [NODE_JS]
     <!-- Linux specific options -->
     <ItemGroup Condition="'$(AotHostOS)' == 'linux'">
       <_LibClang Include="$(ANDROID_NDK_ROOT)/toolchains/llvm/prebuilt/$(MonoToolchainPrebuiltOS)/lib/libclang.so" Condition=" Exists('$(ANDROID_NDK_ROOT)/toolchains/llvm/prebuilt/$(MonoToolchainPrebuiltOS)/lib/libclang.so') "/>
-      <_LibClang Include="$(ANDROID_NDK_ROOT)/toolchains/llvm/prebuilt/$(MonoToolchainPrebuiltOS)/lib64/libclang.so.*" Condition=" '$(_LibClang)' == '' "/>
+      <_LibClang Include="$(ANDROID_NDK_ROOT)/toolchains/llvm/prebuilt/$(MonoToolchainPrebuiltOS)/lib64/libclang.so.*" Condition=" '@(_LibClang)' == '' "/>
-      <_LibClang Include="/usr/local/lib/libclang.so" Condition="'$(_LibClang)' == ''" />
+      <_LibClang Include="/usr/local/lib/libclang.so" Condition="'@(_LibClang)' == ''" />
     </ItemGroup>
     <PropertyGroup Condition="'$(TargetsLinux)' == 'true' and '$(Platform)' == 'arm64'">
       <MonoUseCrossTool>true</MonoUseCrossTool>

src/mono/mono/mini/mini-llvm.c

@@ -8433,7 +8433,21 @@ MONO_RESTORE_WARNING
 			LLVMValueRef dest;
 
 			dest = convert (ctx, LLVMBuildAdd (builder, convert (ctx, values [ins->inst_destbasereg], IntPtrType ()), LLVMConstInt (IntPtrType (), ins->inst_offset, FALSE), ""), pointer_type (t));
-			mono_llvm_build_aligned_store (builder, lhs, dest, FALSE, 1);
+			if (mono_class_value_size (ins->klass, NULL) == 12) {
+				const int mask_values [] = { 0, 1, 2 };
+
+				LLVMValueRef truncatedVec3 = LLVMBuildShuffleVector (
+					builder,
+					lhs,
+					LLVMGetUndef (t),
+					create_const_vector_i32 (mask_values, 3),
+					"truncated_vec3"
+				);
+
+				mono_llvm_build_aligned_store (builder, truncatedVec3, dest, FALSE, 1);
+			} else {
+				mono_llvm_build_aligned_store (builder, lhs, dest, FALSE, 1);
+			}
 			break;
 		}
 		case OP_XBINOP:

src/mono/nuget/Microsoft.NET.Workload.Mono.Toolchain.Current.Manifest/WorkloadManifest.Wasi.targets.in

@@ -9,4 +9,8 @@
   <PropertyGroup Condition="'$(TargetFrameworkIdentifier)' == '.NETCoreApp'">
     <UsingWasiRuntimeWorkload Condition="'$(UsingWasiRuntimeWorkload)' == ''">$(WasiNativeWorkloadAvailable)</UsingWasiRuntimeWorkload>
   </PropertyGroup>
+
+  <Target Name="FailBuild" BeforeTargets="ProcessFrameworkReferences;Restore;Build;Publish" Condition="'$(RuntimeIdentifier)' == 'wasi-wasm'">
+    <Error Text="The 'wasi-experimental' workload is not supported in .NET 9." />
+  </Target>
 </Project>

src/mono/nuget/Microsoft.NET.Workload.Mono.Toolchain.net8.Manifest/WorkloadManifest.json.in

@@ -277,7 +277,7 @@
       "kind": "framework",
       "version": "${PackageVersionNet8}",
       "alias-to": {
-        "any": "Microsoft.NETCore.App.Runtime.Mono.osx-arm64"
+        "any": "Microsoft.NETCore.App.Runtime.osx-arm64"
       }
     },
     "Microsoft.NETCore.App.Runtime.net8.osx-x64": {
@@ -312,8 +312,8 @@
       "kind": "Sdk",
       "version": "${PackageVersionNet8}",
       "alias-to": {
-        "osx-x64": "Microsoft.NETCore.App.Runtime.AOT.osx-arm64.Cross.tvos-arm64",
+        "osx-x64": "Microsoft.NETCore.App.Runtime.AOT.osx-x64.Cross.tvos-arm64",
-        "osx-arm64": "Microsoft.NETCore.App.Runtime.AOT.osx-x64.Cross.tvos-arm64"
+        "osx-arm64": "Microsoft.NETCore.App.Runtime.AOT.osx-arm64.Cross.tvos-arm64"
       }
     },
     "Microsoft.NETCore.App.Runtime.Mono.net8.tvos-arm64" : {

src/mono/wasm/Wasm.Build.Tests/Blazor/MiscTests.cs

@@ -22,7 +22,6 @@ public class MiscTests : BlazorWasmTestBase
     [InlineData("Debug", false)]
     [InlineData("Release", true)]
     [InlineData("Release", false)]
-    [ActiveIssue("https://github.com/dotnet/runtime/issues/103566")]
     public void NativeBuild_WithDeployOnBuild_UsedByVS(string config, bool nativeRelink)
     {
         string id = $"blz_deploy_on_build_{config}_{nativeRelink}_{GetRandomId()}";

src/mono/wasm/Wasm.Build.Tests/BuildTestBase.cs

@@ -605,8 +605,8 @@ namespace Wasm.Build.Tests
         }
 
         protected static string GetSkiaSharpReferenceItems()
-            => @"<PackageReference Include=""SkiaSharp"" Version=""2.88.6"" />
+            => @"<PackageReference Include=""SkiaSharp"" Version=""2.88.9-preview.2.2"" />
-                <PackageReference Include=""SkiaSharp.NativeAssets.WebAssembly"" Version=""2.88.6"" />
+                <PackageReference Include=""SkiaSharp.NativeAssets.WebAssembly"" Version=""2.88.9-preview.2.2"" />
                 <NativeFileReference Include=""$(SkiaSharpStaticLibraryPath)\3.1.56\st\*.a"" />";
 
         protected static string s_mainReturns42 = @"

src/mono/wasm/Wasm.Build.Tests/ConfigSrcTests.cs

@@ -16,7 +16,7 @@ public class ConfigSrcTests : TestMainJsTestBase
 
     // NOTE: port number determinizes dynamically, so could not generate absolute URI
     [Theory]
-    [BuildAndRun(host: RunHost.V8 | RunHost.NodeJS)]
+    [BuildAndRun(host: RunHost.V8)]
     public void ConfigSrcAbsolutePath(BuildArgs buildArgs, RunHost host, string id)
     {
         buildArgs = buildArgs with { ProjectName = $"configsrcabsolute_{buildArgs.Config}_{buildArgs.AOT}" };

src/mono/wasm/Wasm.Build.Tests/HostRunner/NodeJSHostRunner.cs

@@ -8,8 +8,8 @@ namespace Wasm.Build.Tests;
 public class NodeJSHostRunner : IHostRunner
 {
     public string GetTestCommand() => "wasm test";
-    public string GetXharnessArgsWindowsOS(XHarnessArgsOptions options) => $"--js-file={options.jsRelativePath} --engine=NodeJS -v trace --engine-arg=--experimental-wasm-simd --engine-arg=--experimental-wasm-eh";
+    public string GetXharnessArgsWindowsOS(XHarnessArgsOptions options) => $"--js-file={options.jsRelativePath} --engine=NodeJS -v trace";
-    public string GetXharnessArgsOtherOS(XHarnessArgsOptions options) => $"--js-file={options.jsRelativePath} --engine=NodeJS -v trace --locale={options.environmentLocale} --engine-arg=--experimental-wasm-simd --engine-arg=--experimental-wasm-eh";
+    public string GetXharnessArgsOtherOS(XHarnessArgsOptions options) => $"--js-file={options.jsRelativePath} --engine=NodeJS -v trace --locale={options.environmentLocale}";
     public bool UseWasmConsoleOutput() => true;
     public bool CanRunWBT() => true;
 }

src/mono/wasm/Wasm.Build.Tests/NativeLibraryTests.cs

@@ -50,8 +50,7 @@ namespace Wasm.Build.Tests
 
         [Theory]
         [BuildAndRun(aot: false)]
-        [BuildAndRun(aot: true)]
+        [BuildAndRun(aot: true, config: "Release")]
-        [ActiveIssue("https://github.com/dotnet/runtime/issues/103566")]
         public void ProjectUsingSkiaSharp(BuildArgs buildArgs, RunHost host, string id)
         {
             string projectName = $"AppUsingSkiaSharp";

src/mono/wasm/Wasm.Build.Tests/WasmSIMDTests.cs

@@ -66,7 +66,6 @@ namespace Wasm.Build.Tests
                                 DotnetWasmFromRuntimePack: false));
 
             RunAndTestWasmApp(buildArgs,
-                                extraXHarnessArgs: host == RunHost.NodeJS ? "--engine-arg=--experimental-wasm-simd --engine-arg=--experimental-wasm-eh" : "",
                                 expectedExitCode: 42,
                                 test: output =>
                                 {

src/mono/wasm/Wasm.Build.Tests/WasmTemplateTestBase.cs

@@ -57,38 +57,11 @@ public abstract class WasmTemplateTestBase : BuildTestBase
         if (runAnalyzers)
             extraProperties += "<RunAnalyzers>true</RunAnalyzers>";
 
-        if (template == "wasmconsole")
-        {
-            UpdateRuntimeconfigTemplateForNode(_projectDir);
-        }
-
         AddItemsPropertiesToProject(projectfile, extraProperties);
 
         return projectfile;
     }
 
-    private static void UpdateRuntimeconfigTemplateForNode(string projectDir)
-    {
-        // TODO: Can be removed once Node >= 20
-
-        string runtimeconfigTemplatePath = Path.Combine(projectDir, "runtimeconfig.template.json");
-        string runtimeconfigTemplateContent = File.ReadAllText(runtimeconfigTemplatePath);
-        var runtimeconfigTemplate = JsonObject.Parse(runtimeconfigTemplateContent);
-        if (runtimeconfigTemplate == null)
-            throw new Exception($"Unable to parse runtimeconfigtemplate at '{runtimeconfigTemplatePath}'");
-
-        var perHostConfigs = runtimeconfigTemplate?["wasmHostProperties"]?["perHostConfig"]?.AsArray();
-        if (perHostConfigs == null || perHostConfigs.Count == 0 || perHostConfigs[0] == null)
-            throw new Exception($"Unable to find perHostConfig in runtimeconfigtemplate at '{runtimeconfigTemplatePath}'");
-
-        perHostConfigs[0]!["host-args"] = new JsonArray(
-            "--experimental-wasm-simd",
-            "--experimental-wasm-eh"
-        );
-
-        File.WriteAllText(runtimeconfigTemplatePath, runtimeconfigTemplate!.ToString());
-    }
-
     public (string projectDir, string buildOutput) BuildTemplateProject(BuildArgs buildArgs,
         string id,
         BuildProjectOptions buildProjectOptions)

src/native/corehost/hostmisc/pal.windows.cpp

@@ -884,8 +884,12 @@ bool pal::realpath(pal::string_t* path, bool skip_error_logging)
                 }
             }
 
-            // Remove the \\?\ prefix, unless it is necessary or was already there
+            // Remove the UNC extended prefix (\\?\UNC\) or extended prefix (\\?\) unless it is necessary or was already there
-            if (LongFile::IsExtended(str) && !LongFile::IsExtended(*path) &&
+            if (LongFile::IsUNCExtended(str) && !LongFile::IsUNCExtended(*path) && str.length() < MAX_PATH)
+            {
+                str.replace(0, LongFile::UNCExtendedPathPrefix.size(), LongFile::UNCPathPrefix);
+            }
+            else if (LongFile::IsExtended(str) && !LongFile::IsExtended(*path) &&
                 !LongFile::ShouldNormalize(str.substr(LongFile::ExtendedPrefix.size())))
             {
                 str.erase(0, LongFile::ExtendedPrefix.size());

src/native/libs/System.Globalization.Native/pal_locale.m

@@ -786,13 +786,6 @@ const char* GlobalizationNative_GetICUDataPathFallback(void)
     }
 }
 
-static NSString* GetBaseName(NSString *localeIdentifier)
-{
-    NSLocale *locale = [[NSLocale alloc] initWithLocaleIdentifier:localeIdentifier];
-    NSString *languageCode = [locale objectForKey:NSLocaleLanguageCode];
-    return languageCode;
-}
-
 const char* GlobalizationNative_GetDefaultLocaleNameNative(void)
 {
     @autoreleasepool
@@ -800,7 +793,7 @@ const char* GlobalizationNative_GetDefaultLocaleNameNative(void)
         if (NSLocale.preferredLanguages.count > 0)
         {
             NSString *preferredLanguage = [NSLocale.preferredLanguages objectAtIndex:0];
-            return strdup([GetBaseName(preferredLanguage) UTF8String]);
+            return strdup([preferredLanguage UTF8String]);
         }
         else
         {
@@ -821,7 +814,7 @@ const char* GlobalizationNative_GetDefaultLocaleNameNative(void)
                 localeName = currentLocale.localeIdentifier;
             }
 
-            return strdup([GetBaseName(localeName) UTF8String]);
+            return strdup([localeName UTF8String]);
         }
     }
 }

src/tests/JIT/Regression/JitBlue/Runtime_110820/Runtime_110820.cs

@@ -0,0 +1,24 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using Xunit;
+using System.Numerics;
+
+public class Foo
+{
+    public Vector3 v1;
+    public Vector3 v2;
+}
+
+public class Runtime_110820
+{
+    [Fact]
+    public static void TestEntryPoint()
+    {
+        var foo = new Foo();
+        foo.v2 = new Vector3(4, 5, 6);
+        foo.v1 = new Vector3(1, 2, 3);
+        Assert.Equal(new Vector3(1, 2, 3), foo.v1);
+        Assert.Equal(new Vector3(4, 5, 6), foo.v2);
+    }
+}

src/tests/JIT/Regression/JitBlue/Runtime_110820/Runtime_110820.csproj

@@ -0,0 +1,8 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <Optimize>True</Optimize>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="$(MSBuildProjectName).cs" />
+  </ItemGroup>
+</Project>

src/tests/Loader/CollectibleAssemblies/Statics/CollectibleTLSStaticCollection.cs

@@ -0,0 +1,103 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System;
+using System.Reflection;
+using System.Reflection.Emit;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using System.Threading;
+using Xunit;
+
+namespace CollectibleThreadStaticShutdownRace
+{
+    public class CollectibleThreadStaticShutdownRace
+    {
+        Action? UseTLSStaticFromLoaderAllocator = null;
+        GCHandle IsLoaderAllocatorLive;
+        static ulong s_collectibleIndex;
+
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        void CallUseTLSStaticFromLoaderAllocator()
+        {
+            UseTLSStaticFromLoaderAllocator!();
+            UseTLSStaticFromLoaderAllocator = null;
+        }
+
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        bool CheckLALive()
+        {
+            return IsLoaderAllocatorLive.Target != null;
+        }
+
+
+        void ThreadThatWaitsForLoaderAllocatorToDisappear()
+        {
+            CallUseTLSStaticFromLoaderAllocator();
+            while (CheckLALive())
+            {
+                GC.Collect(2);
+            }
+        }
+
+        void CreateLoaderAllocatorWithTLS()
+        {
+            ulong collectibleIndex = s_collectibleIndex++;
+
+            var ab =
+                AssemblyBuilder.DefineDynamicAssembly(
+                    new AssemblyName($"CollectibleDerivedAssembly{collectibleIndex}"),
+                    AssemblyBuilderAccess.RunAndCollect);
+            var mob = ab.DefineDynamicModule($"CollectibleDerivedModule{collectibleIndex}");
+            var tb =
+                mob.DefineType(
+                    $"CollectibleDerived{collectibleIndex}",
+                    TypeAttributes.Class | TypeAttributes.Public,
+                    typeof(object));
+
+            {
+                var fb =
+                    tb.DefineField(
+                        "Field", typeof(int), FieldAttributes.Static);
+                fb.SetCustomAttribute(typeof(ThreadStaticAttribute).GetConstructors()[0], new byte[0]);
+
+                var mb =
+                    tb.DefineMethod(
+                        "Method",
+                        MethodAttributes.Public | MethodAttributes.Static);
+                var ilg = mb.GetILGenerator();
+                ilg.Emit(OpCodes.Ldc_I4_1);
+                ilg.Emit(OpCodes.Stsfld, fb);
+                ilg.Emit(OpCodes.Ret);
+            }
+
+            Type createdType = tb.CreateType();
+            UseTLSStaticFromLoaderAllocator = (Action)createdType.GetMethods()[0].CreateDelegate(typeof(Action));
+            IsLoaderAllocatorLive = GCHandle.Alloc(createdType, GCHandleType.WeakTrackResurrection);
+        }
+
+        void ForceCollectibleTLSStaticToGoThroughThreadTermination()
+        {
+            int iteration = 0;
+            for (int i = 0; i < 10; i++)
+            {
+                Console.WriteLine($"Iteration {iteration++}");
+                var createLAThread = new Thread(CreateLoaderAllocatorWithTLS);
+                createLAThread.Start();
+                createLAThread.Join();
+
+                var crashThread = new Thread(ThreadThatWaitsForLoaderAllocatorToDisappear);
+                crashThread.Start();
+                crashThread.Join();
+            }
+
+        }
+
+        [Fact]
+        public static void TestEntryPoint()
+        {
+            new CollectibleThreadStaticShutdownRace().ForceCollectibleTLSStaticToGoThroughThreadTermination();
+        }
+    }
+}
+

src/tests/Loader/CollectibleAssemblies/Statics/CollectibleTLSStaticCollection.csproj

@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <!-- Needed for mechanical merging of all remaining tests, this particular project may not actually need process isolation -->
+    <RequiresProcessIsolation>true</RequiresProcessIsolation>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="CollectibleTLSStaticCollection.cs" />
+  </ItemGroup>
+</Project>

src/tests/baseservices/compilerservices/UnsafeAccessors/UnsafeAccessorsTests.cs

@@ -328,28 +328,70 @@ public static unsafe class UnsafeAccessorsTests
         extern static ref delegate*<void> GetFPtr(ref AllFields f);
     }
 
-    // Contains fields that have modopts/modreqs
+    // Contains fields that are volatile
-    struct FieldsWithModifiers
+    struct VolatileFields
     {
         private static volatile int s_vInt;
         private volatile int _vInt;
     }
 
-    [Fact]
+    // Accessors for fields that are volatile
-    public static void Verify_AccessFieldsWithModifiers()
+    static class AccessorsVolatile
     {
-        Console.WriteLine($"Running {nameof(Verify_AccessFieldsWithModifiers)}");
-
-        FieldsWithModifiers fieldsWithModifiers = default;
-
-        GetStaticVolatileInt(ref fieldsWithModifiers) = default;
-        GetVolatileInt(ref fieldsWithModifiers) = default;
-
         [UnsafeAccessor(UnsafeAccessorKind.StaticField, Name="s_vInt")]
-        extern static ref int GetStaticVolatileInt(ref FieldsWithModifiers f);
+        public extern static ref int GetStaticVolatileInt(ref VolatileFields f);
 
         [UnsafeAccessor(UnsafeAccessorKind.Field, Name="_vInt")]
-        extern static ref int GetVolatileInt(ref FieldsWithModifiers f);
+        public extern static ref int GetVolatileInt(ref VolatileFields f);
+    }
+
+    [Fact]
+    public static void Verify_AccessFieldsWithVolatile()
+    {
+        Console.WriteLine($"Running {nameof(Verify_AccessFieldsWithVolatile)}");
+
+        VolatileFields fieldsWithVolatile = default;
+
+        AccessorsVolatile.GetStaticVolatileInt(ref fieldsWithVolatile) = default;
+        AccessorsVolatile.GetVolatileInt(ref fieldsWithVolatile) = default;
+    }
+
+    // Contains fields that are readonly
+    readonly struct ReadOnlyFields
+    {
+        public static readonly int s_rInt;
+        public readonly int _rInt;
+    }
+
+    // Accessors for fields that are readonly
+    static class AccessorsReadOnly
+    {
+        [UnsafeAccessor(UnsafeAccessorKind.StaticField, Name="s_rInt")]
+        public extern static ref readonly int GetStaticReadOnlyInt(ref readonly ReadOnlyFields f);
+
+        [UnsafeAccessor(UnsafeAccessorKind.Field, Name="_rInt")]
+        public extern static ref readonly int GetReadOnlyInt(ref readonly ReadOnlyFields f);
+    }
+
+    [Fact]
+    public static void Verify_AccessFieldsWithReadOnlyRefs()
+    {
+        Console.WriteLine($"Running {nameof(Verify_AccessFieldsWithReadOnlyRefs)}");
+
+        ReadOnlyFields readOnlyFields = default;
+
+        Assert.True(Unsafe.AreSame(in AccessorsReadOnly.GetStaticReadOnlyInt(in readOnlyFields), in ReadOnlyFields.s_rInt));
+        Assert.True(Unsafe.AreSame(in AccessorsReadOnly.GetReadOnlyInt(in readOnlyFields), in readOnlyFields._rInt));
+
+        // Test the local declaration of the signature since it places modopts/modreqs differently.
+        Assert.True(Unsafe.AreSame(in GetStaticReadOnlyIntLocal(in readOnlyFields), in ReadOnlyFields.s_rInt));
+        Assert.True(Unsafe.AreSame(in GetReadOnlyIntLocal(in readOnlyFields), in readOnlyFields._rInt));
+
+        [UnsafeAccessor(UnsafeAccessorKind.StaticField, Name="s_rInt")]
+        extern static ref readonly int GetStaticReadOnlyIntLocal(ref readonly ReadOnlyFields f);
+
+        [UnsafeAccessor(UnsafeAccessorKind.Field, Name="_rInt")]
+        extern static ref readonly int GetReadOnlyIntLocal(ref readonly ReadOnlyFields f);
     }
 
     [Fact]

src/tests/issues.targets

@@ -1010,6 +1010,9 @@
         <ExcludeList Include="$(XunitTestBinBase)/Loader/CollectibleAssemblies/ByRefLocals/ByRefLocals/*">
             <Issue>https://github.com/dotnet/runtimelab/issues/155: Collectible assemblies</Issue>
         </ExcludeList>
+        <ExcludeList Include="$(XunitTestBinBase)/Loader/CollectibleAssemblies/Statics/CollectibleTLSStaticCollection/*">
+            <Issue>https://github.com/dotnet/runtimelab/issues/155: Collectible assemblies</Issue>
+        </ExcludeList>
         <ExcludeList Include="$(XunitTestBinBase)/Loader/CollectibleAssemblies/Statics/CollectibleStatics/*">
             <Issue>https://github.com/dotnet/runtimelab/issues/155: Collectible assemblies</Issue>
         </ExcludeList>
@@ -2464,6 +2467,10 @@
         <ExcludeList Include = "$(XunitTestBinBase)/reflection/RefEmit/EmittingIgnoresAccessChecksToAttributeIsRespected/**">
             <Issue>Reflection.Emit is not supported on fullaot</Issue>
         </ExcludeList>
+
+        <ExcludeList Include="$(XunitTestBinBase)/Loader\classloader\MethodImpl\CovariantReturns\UnitTest\UnitTest_GVM_TypeLoadException\*">
+            <Issue>Attempting to JIT compile method 'void CMain:RunInvalidTest1 ()' while running in aot-only mode.</Issue>
+        </ExcludeList>
     </ItemGroup>
 
     <ItemGroup Condition="'$(RuntimeFlavor)' == 'mono' and ('$(RuntimeVariant)' == 'llvmfullaot' or '$(RuntimeVariant)' == 'llvmaot' or '$(RuntimeVariant)' == 'minifullaot' or '$(TargetsAppleMobile)' == 'true')">