Enable IDE0065 (Misplaced using directive) (#70919)

eng/CodeAnalysis.src.globalconfig

@@ -1492,7 +1492,7 @@ dotnet_diagnostic.IDE0063.severity = silent
 dotnet_diagnostic.IDE0064.severity = silent
 
 # IDE0065: Misplaced using directive
-dotnet_diagnostic.IDE0065.severity = suggestion
+dotnet_diagnostic.IDE0065.severity = warning
 
 # IDE0066: Convert switch statement to expression
 dotnet_diagnostic.IDE0066.severity = suggestion

src/coreclr/nativeaot/Directory.Build.props

@@ -34,7 +34,7 @@
     <NoWarn>$(NoWarn);CS8602;CS8603;CS8604;CS8618;CS8625;CS8632;CS8765</NoWarn>
 
     <!-- we should just fix -->
-    <NoWarn>$(NoWarn);CA1810;CA1823;CA1825;CA1852;CA2208;SA1129;SA1205;SA1400;SA1517</NoWarn>
+    <NoWarn>$(NoWarn);CA1810;CA1823;CA1825;CA1852;CA2208;SA1129;SA1205;SA1400;SA1517;IDE0065</NoWarn>
 
     <!-- Arrays as attribute arguments is not CLS-compliant -->
     <NoWarn>$(NoWarn);CS3016</NoWarn>

src/libraries/System.ComponentModel.TypeConverter/src/System/ComponentModel/DesignTimeVisibleAttribute.cs

@@ -1,11 +1,11 @@
 // 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.Diagnostics.CodeAnalysis;
+
 namespace System.ComponentModel
 {
-    using System;
-    using System.Diagnostics.CodeAnalysis;
-
     /// <summary>
     /// DesignTimeVisibileAttribute marks a component's visibility. If
     /// DesignTimeVisibileAttribute.Yes is present, a visual designer can show

src/libraries/System.Configuration.ConfigurationManager/src/System/Configuration/ConfigDefinitionUpdates.cs

@@ -1,10 +1,10 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Collections;
+
 namespace System.Configuration
 {
-    using Collections;
-
     // Contains all the updates to section definitions across all location sections.
     internal sealed class ConfigDefinitionUpdates
     {

src/libraries/System.Data.OleDb/src/OleDbConnection.cs

@@ -9,11 +9,10 @@ using System.Diagnostics.CodeAnalysis;
 using System.Globalization;
 using System.Runtime.InteropServices;
 using System.Text;
+using SysTx = System.Transactions;
 
 namespace System.Data.OleDb
 {
-    using SysTx = Transactions;
-
     // wraps the OLEDB IDBInitialize interface which represents a connection
     // Notes about connection pooling
     // 1. Only happens if we use the IDataInitialize or IDBPromptInitialize interfaces

src/libraries/System.Data.OleDb/src/OleDbConnectionInternal.cs

@@ -8,11 +8,10 @@ using System.Diagnostics;
 using System.Globalization;
 using System.Runtime.InteropServices;
 using System.Threading;
+using SysTx = System.Transactions;
 
 namespace System.Data.OleDb
 {
-    using SysTx = Transactions;
-
     internal sealed class OleDbConnectionInternal : DbConnectionInternal, IDisposable
     {
         private static volatile OleDbServicesWrapper? idataInitialize;

src/libraries/System.Data.OleDb/src/OleDbStruct.cs

@@ -2,14 +2,13 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 
 using System.Runtime.InteropServices;
+#if DEBUG
+using System.Globalization;
+using System.Text;
+#endif
 
 namespace System.Data.OleDb
 {
-#if DEBUG
-    using Globalization;
-    using Text;
-#endif
-
     internal enum DBBindStatus
     {
         OK = 0,

src/libraries/System.Data.OleDb/src/System/Data/ProviderBase/DbConnectionHelper.cs

@@ -5,11 +5,10 @@ using System.Data.Common;
 using System.Data.ProviderBase;
 using System.Diagnostics;
 using System.Threading;
+using SysTx = System.Transactions;
 
 namespace System.Data.OleDb
 {
-    using SysTx = Transactions;
-
     public sealed partial class OleDbConnection : DbConnection
     {
         private static readonly DbConnectionFactory _connectionFactory = OleDbConnectionFactory.SingletonInstance;

src/libraries/System.Data.OleDb/src/System/Data/ProviderBase/DbConnectionPool.cs

@@ -11,11 +11,10 @@ using System.Runtime.InteropServices;
 using System.Runtime.Versioning;
 using System.Threading;
 using System.Threading.Tasks;
+using SysTx = System.Transactions;
 
 namespace System.Data.ProviderBase
 {
-    using SysTx = Transactions;
-
     internal sealed class DbConnectionPool
     {
         private enum State

src/libraries/System.DirectoryServices.AccountManagement/src/System/DirectoryServices/AccountManagement/ExtensionCache.cs

@@ -1,13 +1,13 @@
 // 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.Collections.Generic;
+using System.Collections;
+using System.DirectoryServices;
+
 namespace System.DirectoryServices.AccountManagement
 {
-    using System;
-    using System.Collections.Generic;
-    using System.Collections;
-    using System.DirectoryServices;
-
     internal sealed class ExtensionCacheValue
     {
         internal ExtensionCacheValue(object[] value)

src/libraries/System.DirectoryServices.AccountManagement/src/System/DirectoryServices/AccountManagement/interopt.cs

@@ -1,17 +1,15 @@
 // 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.Runtime.InteropServices;
+
 // This file defines many COM dual interfaces which are legacy and,
 // cannot be changed.  Tolerate possible obsoletion.
-//
 #pragma warning disable CS0618 // Type or member is obsolete
 
 namespace System.DirectoryServices.AccountManagement
 {
-    using System.Runtime.InteropServices;
-    using System;
-
     internal static class Constants
     {
         internal static byte[] GUID_FOREIGNSECURITYPRINCIPALS_CONTAINER_BYTE = new byte[] { 0x22, 0xb7, 0x0c, 0x67, 0xd5, 0x6e, 0x4e, 0xfb, 0x91, 0xe9, 0x30, 0x0f, 0xca, 0x3d, 0xc1, 0xaa };

src/libraries/System.Drawing.Common/src/System/Drawing/ImageAnimator.cs

@@ -1,15 +1,14 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Collections.Generic;
+using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
+using System.Drawing.Imaging;
+using System.Threading;
 
 namespace System.Drawing
 {
-    using System.Collections.Generic;
-    using System.Diagnostics;
-    using System.Drawing.Imaging;
-    using System.Threading;
-
     /// <summary>
     ///     Animates one or more images that have time-based frames.
     ///     See the ImageInfo.cs file for the helper nested ImageInfo class.

src/libraries/System.Drawing.Common/src/System/Drawing/Imaging/ImageCodecInfoPrivate.cs

@@ -1,10 +1,10 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Runtime.InteropServices;
+
 namespace System.Drawing.Imaging
 {
-    using System.Runtime.InteropServices;
-
     // sdkinc\imaging.h
     [StructLayout(LayoutKind.Sequential, Pack = 8)]
     internal struct ImageCodecInfoPrivate

src/libraries/System.Drawing.Common/src/System/Drawing/Imaging/MetafileHeaderEmf.cs

@@ -1,14 +1,14 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
-namespace System.Drawing.Imaging
-{
-    using System.Runtime.CompilerServices;
-    using System.Runtime.InteropServices;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
 #if NET7_0_OR_GREATER
-    using System.Runtime.InteropServices.Marshalling;
+using System.Runtime.InteropServices.Marshalling;
 #endif
 
+namespace System.Drawing.Imaging
+{
 #if NET7_0_OR_GREATER
     [NativeMarshalling(typeof(PinningMarshaller))]
 #endif

src/libraries/System.Drawing.Common/src/System/Drawing/Imaging/MetafileHeaderWmf.cs

@@ -1,15 +1,15 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
-namespace System.Drawing.Imaging
-{
-    using System.Diagnostics;
-    using System.Runtime.CompilerServices;
-    using System.Runtime.InteropServices;
+using System.Diagnostics;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
 #if NET7_0_OR_GREATER
 using System.Runtime.InteropServices.Marshalling;
 #endif
 
+namespace System.Drawing.Imaging
+{
     [StructLayout(LayoutKind.Sequential, Pack = 8)]
     internal sealed class MetafileHeaderWmf
     {

src/libraries/System.Private.CoreLib/src/System/Resources/ResourceReader.cs

@@ -15,9 +15,11 @@ namespace System.Resources
     .Extensions
 #endif
 {
+#pragma warning disable IDE0065
 #if RESOURCES_EXTENSIONS
     using ResourceReader = DeserializingResourceReader;
 #endif
+#pragma warning restore IDE0065
 
     // Provides the default implementation of IResourceReader, reading
     // .resources file from the system default binary format.  This class

src/libraries/System.Private.CoreLib/src/System/Resources/RuntimeResourceSet.cs

@@ -11,9 +11,12 @@ namespace System.Resources
     .Extensions
 #endif
 {
+#pragma warning disable IDE0065
 #if RESOURCES_EXTENSIONS
     using ResourceReader = DeserializingResourceReader;
 #endif
+#pragma warning restore IDE0065
+
     // A RuntimeResourceSet stores all the resources defined in one
     // particular CultureInfo, with some loading optimizations.
     //

src/libraries/System.Private.DataContractSerialization/src/System/Runtime/Serialization/ClassDataContract.cs

@@ -1,24 +1,23 @@
 // 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.Collections;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
+using System.Globalization;
+using System.IO;
+using System.Linq;
+using System.Reflection;
+using System.Runtime.CompilerServices;
 using System.Security;
+using System.Threading;
+using System.Xml;
+using DataContractDictionary = System.Collections.Generic.Dictionary<System.Xml.XmlQualifiedName, System.Runtime.Serialization.DataContract>;
 
 namespace System.Runtime.Serialization
 {
-    using System;
-    using System.Collections;
-    using System.Diagnostics;
-    using System.Collections.Generic;
-    using System.IO;
-    using System.Globalization;
-    using System.Reflection;
-    using System.Runtime.CompilerServices;
-    using System.Threading;
-    using System.Xml;
-    using DataContractDictionary = System.Collections.Generic.Dictionary<System.Xml.XmlQualifiedName, DataContract>;
-    using System.Linq;
-    using System.Diagnostics.CodeAnalysis;
-
     internal sealed class ClassDataContract : DataContract
     {
         public XmlDictionaryString[]? ContractNamespaces;

src/libraries/System.Private.DataContractSerialization/src/System/Runtime/Serialization/CollectionDataContract.cs

@@ -1,22 +1,21 @@
 // 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.Collections;
+using System.Collections.Generic;
 using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
+using System.Linq;
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Security;
+using System.Threading;
+using System.Xml;
+using DataContractDictionary = System.Collections.Generic.Dictionary<System.Xml.XmlQualifiedName, System.Runtime.Serialization.DataContract>;
 
 namespace System.Runtime.Serialization
 {
-    using System;
-    using System.Collections;
-    using System.Collections.Generic;
-    using System.Reflection;
-    using System.Runtime.CompilerServices;
-    using System.Threading;
-    using System.Xml;
-    using System.Linq;
-    using DataContractDictionary = System.Collections.Generic.Dictionary<System.Xml.XmlQualifiedName, DataContract>;
-    using System.Security;
-    using System.Diagnostics.CodeAnalysis;
-
     // The interface is a perf optimization.
     // Only KeyValuePairAdapter should implement the interface.
     internal interface IKeyValuePairAdapter { }

src/libraries/System.Private.DataContractSerialization/src/System/Runtime/Serialization/DataContract.cs

@@ -1,24 +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 System;
+using System.Buffers.Binary;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
+using System.Globalization;
+using System.Linq;
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Text;
+using System.Text.RegularExpressions;
+using System.Xml;
+using System.Xml.Schema;
+using DataContractDictionary = System.Collections.Generic.Dictionary<System.Xml.XmlQualifiedName, System.Runtime.Serialization.DataContract>;
+
 namespace System.Runtime.Serialization
 {
-    using System;
-    using System.Buffers.Binary;
-    using System.Collections.Generic;
-    using System.Globalization;
-    using System.Reflection;
-    using System.Text;
-    using System.Xml;
-    using DataContractDictionary = System.Collections.Generic.Dictionary<System.Xml.XmlQualifiedName, DataContract>;
-    using System.Text.RegularExpressions;
-    using System.Runtime.CompilerServices;
-    using System.Linq;
-    using Xml.Schema;
-    using System.Collections.Concurrent;
-    using System.Diagnostics.CodeAnalysis;
-    using System.Diagnostics;
-
     internal abstract class DataContract
     {
         private XmlDictionaryString _name;

src/libraries/System.Private.DataContractSerialization/src/System/Runtime/Serialization/DataContractSerializer.cs

@@ -1,22 +1,22 @@
 // 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.Collections;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
+using System.Globalization;
+using System.IO;
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Text;
+using System.Xml;
+using DataContractDictionary = System.Collections.Generic.Dictionary<System.Xml.XmlQualifiedName, System.Runtime.Serialization.DataContract>;
+
 namespace System.Runtime.Serialization
 {
-    using System;
-    using System.Collections;
-    using System.Diagnostics;
-    using System.Globalization;
-    using System.IO;
-    using System.Reflection;
-    using System.Text;
-    using System.Xml;
-    using System.Collections.Generic;
-    using System.Collections.ObjectModel;
-    using System.Runtime.CompilerServices;
-    using DataContractDictionary = System.Collections.Generic.Dictionary<System.Xml.XmlQualifiedName, DataContract>;
-    using System.Diagnostics.CodeAnalysis;
-
     public sealed class DataContractSerializer : XmlObjectSerializer
     {
         private Type _rootType;

src/libraries/System.Private.DataContractSerialization/src/System/Runtime/Serialization/DataContractSurrogateCaller.cs

@@ -1,14 +1,14 @@
 // 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.CodeDom;
+using System.Collections.ObjectModel;
+using System.Diagnostics.CodeAnalysis;
+using System.Reflection;
+
 namespace System.Runtime.Serialization
 {
-    using System;
-    using System.CodeDom;
-    using System.Reflection;
-    using System.Collections.ObjectModel;
-    using System.Diagnostics.CodeAnalysis;
-
     internal static class DataContractSurrogateCaller
     {
         [RequiresUnreferencedCode(DataContract.SerializerTrimmerWarning)]

src/libraries/System.Private.DataContractSerialization/src/System/Runtime/Serialization/Json/DataContractJsonSerializer.cs

@@ -1,23 +1,22 @@
 // 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.Collections;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Diagnostics.CodeAnalysis;
+using System.Globalization;
+using System.IO;
+using System.Reflection;
+using System.Runtime.Serialization;
+using System.Security;
+using System.Text;
+using System.Xml;
+using DataContractDictionary = System.Collections.Generic.Dictionary<System.Xml.XmlQualifiedName, System.Runtime.Serialization.DataContract>;
+
 namespace System.Runtime.Serialization.Json
 {
-    using System.Runtime.Serialization;
-    using System;
-    using System.Collections.Generic;
-    using System.Collections.ObjectModel;
-    using System.IO;
-    using System.Text;
-    using System.Xml;
-    using System.Collections;
-    using DataContractDictionary = System.Collections.Generic.Dictionary<System.Xml.XmlQualifiedName, DataContract>;
-
-    using System.Globalization;
-    using System.Reflection;
-    using System.Security;
-    using System.Diagnostics.CodeAnalysis;
-
     public sealed class DataContractJsonSerializer : XmlObjectSerializer
     {
         internal IList<Type>? knownTypeList;

src/libraries/System.Private.DataContractSerialization/src/System/Runtime/Serialization/Json/JsonFormatReaderGenerator.cs

@@ -2,20 +2,17 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 
 using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
+using System.Reflection;
+using System.Reflection.Emit;
+using System.Runtime;
+using System.Security;
 using System.Xml;
 
 namespace System.Runtime.Serialization.Json
 {
-    using System;
-    using System.Collections.Generic;
-    using System.Diagnostics;
-    using System.Diagnostics.CodeAnalysis;
-    using System.Reflection;
-    using System.Reflection.Emit;
-    using System.Runtime;
-    using System.Security;
-    using System.Xml;
-
     internal delegate object JsonFormatClassReaderDelegate(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContextComplexJson? context, XmlDictionaryString emptyDictionaryString, XmlDictionaryString[]? memberNames);
     internal delegate object JsonFormatCollectionReaderDelegate(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContextComplexJson context, XmlDictionaryString emptyDictionaryString, XmlDictionaryString itemName, CollectionDataContract collectionContract);
     internal delegate void JsonFormatGetOnlyCollectionReaderDelegate(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContextComplexJson context, XmlDictionaryString emptyDictionaryString, XmlDictionaryString itemName, CollectionDataContract collectionContract);

src/libraries/System.Private.DataContractSerialization/src/System/Runtime/Serialization/Json/JsonFormatWriterGenerator.cs

@@ -2,19 +2,16 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 
 using System;
+using System.Collections;
+using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
+using System.Reflection;
+using System.Reflection.Emit;
+using System.Security;
 using System.Xml;
 
 namespace System.Runtime.Serialization.Json
 {
-    using System;
-    using System.Collections;
-    using System.Diagnostics;
-    using System.Diagnostics.CodeAnalysis;
-    using System.Reflection;
-    using System.Reflection.Emit;
-    using System.Security;
-    using System.Xml;
-
     internal delegate void JsonFormatClassWriterDelegate(XmlWriterDelegator xmlWriter, object obj, XmlObjectSerializerWriteContextComplexJson context, ClassDataContract dataContract, XmlDictionaryString[]? memberNames);
     internal delegate void JsonFormatCollectionWriterDelegate(XmlWriterDelegator xmlWriter, object obj, XmlObjectSerializerWriteContextComplexJson context, CollectionDataContract dataContract);
 

src/libraries/System.Private.DataContractSerialization/src/System/Runtime/Serialization/ScopedKnownTypes.cs

@@ -1,12 +1,12 @@
 // 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.Xml;
+using DataContractDictionary = System.Collections.Generic.Dictionary<System.Xml.XmlQualifiedName, System.Runtime.Serialization.DataContract>;
+
 namespace System.Runtime.Serialization
 {
-    using System;
-    using System.Xml;
-    using DataContractDictionary = System.Collections.Generic.Dictionary<System.Xml.XmlQualifiedName, DataContract>;
-
     internal struct ScopedKnownTypes
     {
         internal DataContractDictionary[] dataContractDictionaries;

src/libraries/System.Private.DataContractSerialization/src/System/Runtime/Serialization/SurrogateDataContract.cs

@@ -1,14 +1,14 @@
 // 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.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
+using System.Runtime.CompilerServices;
+using System.Security;
+
 namespace System.Runtime.Serialization
 {
-    using System;
-    using System.Security;
-    using System.Runtime.CompilerServices;
-    using System.Diagnostics;
-    using System.Diagnostics.CodeAnalysis;
-
     internal sealed class SurrogateDataContract : DataContract
     {
         private readonly SurrogateDataContractCriticalHelper _helper;

src/libraries/System.Private.DataContractSerialization/src/System/Runtime/Serialization/XmlDataContract.cs

@@ -1,21 +1,21 @@
 // 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.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
+using System.Linq;
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Security;
+using System.Threading;
+using System.Xml;
+using System.Xml.Schema;
+using System.Xml.Serialization;
+using DataContractDictionary = System.Collections.Generic.Dictionary<System.Xml.XmlQualifiedName, System.Runtime.Serialization.DataContract>;
+
 namespace System.Runtime.Serialization
 {
-    using System;
-    using System.Collections.Generic;
-    using System.Reflection;
-    using System.Threading;
-    using System.Xml;
-    using DataContractDictionary = System.Collections.Generic.Dictionary<System.Xml.XmlQualifiedName, DataContract>;
-    using System.Xml.Serialization;
-    using System.Xml.Schema;
-    using System.Security;
-    using System.Linq;
-    using System.Runtime.CompilerServices;
-    using System.Diagnostics.CodeAnalysis;
-
     internal delegate IXmlSerializable CreateXmlSerializableDelegate();
     internal sealed class XmlDataContract : DataContract
     {

src/libraries/System.Private.DataContractSerialization/src/System/Runtime/Serialization/XmlObjectSerializer.cs

@@ -1,19 +1,19 @@
 // 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.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
+using System.Globalization;
+using System.IO;
+using System.Runtime.CompilerServices;
+using System.Security;
+using System.Text;
+using System.Xml;
+using DataContractDictionary = System.Collections.Generic.Dictionary<System.Xml.XmlQualifiedName, System.Runtime.Serialization.DataContract>;
+
 namespace System.Runtime.Serialization
 {
-    using System;
-    using System.Diagnostics;
-    using System.Globalization;
-    using System.IO;
-    using System.Xml;
-    using System.Runtime.CompilerServices;
-    using System.Text;
-    using System.Security;
-    using DataContractDictionary = System.Collections.Generic.Dictionary<System.Xml.XmlQualifiedName, DataContract>;
-    using System.Diagnostics.CodeAnalysis;
-
     public abstract class XmlObjectSerializer
     {
         [RequiresUnreferencedCode(DataContract.SerializerTrimmerWarning)]

src/libraries/System.Private.DataContractSerialization/src/System/Runtime/Serialization/XmlObjectSerializerContext.cs

@@ -1,17 +1,17 @@
 // 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.Collections.Generic;
+using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
+using System.Reflection;
+using System.Security;
+using System.Xml;
+using DataContractDictionary = System.Collections.Generic.Dictionary<System.Xml.XmlQualifiedName, System.Runtime.Serialization.DataContract>;
+
 namespace System.Runtime.Serialization
 {
-    using System;
-    using System.Collections.Generic;
-    using System.Diagnostics;
-    using System.Diagnostics.CodeAnalysis;
-    using System.Reflection;
-        using System.Security;
-    using System.Xml;
-    using DataContractDictionary = System.Collections.Generic.Dictionary<System.Xml.XmlQualifiedName, DataContract>;
-
     internal class XmlObjectSerializerContext
     {
         protected XmlObjectSerializer serializer;

src/libraries/System.Private.DataContractSerialization/src/System/Runtime/Serialization/XmlObjectSerializerReadContext.cs

@@ -1,19 +1,19 @@
 // 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.Collections;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
+using System.Security;
+using System.Text;
+using System.Xml;
+using System.Xml.Serialization;
+using DataContractDictionary = System.Collections.Generic.Dictionary<System.Xml.XmlQualifiedName, System.Runtime.Serialization.DataContract>;
+
 namespace System.Runtime.Serialization
 {
-    using System;
-    using System.Collections;
-    using System.Collections.Generic;
-    using System.Diagnostics;
-    using System.Text;
-    using System.Xml;
-    using System.Xml.Serialization;
-    using System.Security;
-    using DataContractDictionary = System.Collections.Generic.Dictionary<System.Xml.XmlQualifiedName, DataContract>;
-    using System.Diagnostics.CodeAnalysis;
-
     internal class XmlObjectSerializerReadContext : XmlObjectSerializerContext
     {
         internal Attributes? attributes;

src/libraries/System.Private.DataContractSerialization/src/System/Runtime/Serialization/XmlSerializableServices.cs

@@ -1,12 +1,12 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Collections.Generic;
+using System.Xml;
+using System.Xml.Schema;
+
 namespace System.Runtime.Serialization
 {
-    using System.Collections.Generic;
-    using System.Xml;
-    using System.Xml.Schema;
-
     public static class XmlSerializableServices
     {
         public static XmlNode[] ReadNodes(XmlReader xmlReader)

src/libraries/System.Private.Xml/src/Misc/HResults.cs

@@ -36,8 +36,6 @@ gets updated.
 
 namespace System
 {
-    using System;
-
     internal static class HResults
     {
         // Xml

src/libraries/System.Private.Xml/src/System/Xml/Core/QueryOutputWriter.cs

@@ -1,16 +1,15 @@
 // 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.Collections.Generic;
+using System.Diagnostics;
+using System.Globalization;
+using System.IO;
+using System.Xml.Schema;
+
 namespace System.Xml
 {
-    using System;
-    using System.Globalization;
-    using System.IO;
-    using System.Collections.Generic;
-    using System.Xml.Schema;
-    using System.Diagnostics;
-
-
     /// <summary>
     /// This writer wraps an XmlRawWriter and inserts additional lexical information into the resulting
     /// Xml 1.0 document:

src/libraries/System.Private.Xml/src/System/Xml/Core/XmlAutoDetectWriter.cs

@@ -1,17 +1,16 @@
 // 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.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
+using System.IO;
+using System.Text;
+using System.Xml;
+using System.Xml.Schema;
+
 namespace System.Xml
 {
-    using System;
-    using System.Diagnostics;
-    using System.Diagnostics.CodeAnalysis;
-    using System.IO;
-    using System.Text;
-    using System.Xml;
-    using System.Xml.Schema;
-
-
     /// <summary>
     /// This writer implements XmlOutputMethod.AutoDetect.  If the first element is "html", then output will be
     /// directed to an Html writer.  Otherwise, output will be directed to an Xml writer.

src/libraries/System.Private.Xml/src/System/Xml/DiagnosticsSwitches.cs

@@ -1,10 +1,10 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Diagnostics;
+
 namespace System.Xml
 {
-    using System.Diagnostics;
-
     internal static class DiagnosticsSwitches
     {
         private static volatile BooleanSwitch? s_keepTempFiles;

src/libraries/System.Private.Xml/src/System/Xml/Dom/XPathNodeList.cs

@@ -1,13 +1,13 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Diagnostics;
+using System.Collections;
+using System.Collections.Generic;
+using System.Xml.XPath;
+
 namespace System.Xml
 {
-    using System.Xml.XPath;
-    using System.Diagnostics;
-    using System.Collections;
-    using System.Collections.Generic;
-
     internal sealed class XPathNodeList : XmlNodeList
     {
         private readonly List<XmlNode?> _list;

src/libraries/System.Private.Xml/src/System/Xml/Dom/XmlName.cs

@@ -1,12 +1,12 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Diagnostics;
+using System.Text;
+using System.Xml.Schema;
+
 namespace System.Xml
 {
-    using System.Text;
-    using System.Diagnostics;
-    using System.Xml.Schema;
-
     internal class XmlName : IXmlSchemaInfo
     {
         private readonly string _prefix;

src/libraries/System.Private.Xml/src/System/Xml/Dom/XmlNodeReader.cs

@@ -1,17 +1,17 @@
 // 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.Collections;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Globalization;
+using System.IO;
+using System.Text;
+using System.Xml.Schema;
+
 namespace System.Xml
 {
-    using System;
-    using System.Text;
-    using System.IO;
-    using System.Diagnostics;
-    using System.Collections;
-    using System.Collections.Generic;
-    using System.Xml.Schema;
-    using System.Globalization;
-
     internal sealed class XmlNodeReaderNavigator
     {
         private XmlNode _curNode;

src/libraries/System.Private.Xml/src/System/Xml/Dom/XmlNotation.cs

@@ -1,11 +1,11 @@
 // 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.Diagnostics;
+
 namespace System.Xml
 {
-    using System;
-    using System.Diagnostics;
-
     // Contains a notation declared in the DTD or schema.
     public class XmlNotation : XmlNode
     {

src/libraries/System.Private.Xml/src/System/Xml/Schema/Asttree.cs

@@ -1,17 +1,17 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Xml.XPath;
+using System.Diagnostics;
+using System.Globalization;
+using System.IO;
+using System.Collections;
+using System.Xml.Schema;
+using MS.Internal.Xml.XPath;
+using System.Diagnostics.CodeAnalysis;
+
 namespace System.Xml.Schema
 {
-    using System.Xml.XPath;
-    using System.Diagnostics;
-    using System.Globalization;
-    using System.IO;
-    using System.Collections;
-    using System.Xml.Schema;
-    using MS.Internal.Xml.XPath;
-    using System.Diagnostics.CodeAnalysis;
-
     /*--------------------------------------------------------------------------------------------- *
      * Dynamic Part Below...                                                                        *
      * -------------------------------------------------------------------------------------------- */

src/libraries/System.Private.Xml/src/System/Xml/Schema/AutoValidator.cs

@@ -1,11 +1,11 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Diagnostics;
+using System.Globalization;
+
 namespace System.Xml.Schema
 {
-    using System.Diagnostics;
-    using System.Globalization;
-
 #pragma warning disable 618
 
     internal sealed class AutoValidator : BaseValidator

src/libraries/System.Private.Xml/src/System/Xml/Schema/BaseProcessor.cs

@@ -1,12 +1,12 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Collections;
+using System.Text;
+using System.Diagnostics;
+
 namespace System.Xml.Schema
 {
-    using System.Collections;
-    using System.Text;
-    using System.Diagnostics;
-
     internal class BaseProcessor
     {
         private readonly XmlNameTable _nameTable;

src/libraries/System.Private.Xml/src/System/Xml/Schema/BaseValidator.cs

@@ -1,15 +1,15 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.IO;
+using System.Diagnostics;
+using System.Xml;
+using System.Text;
+using System.Collections;
+using System.Diagnostics.CodeAnalysis;
+
 namespace System.Xml.Schema
 {
-    using System.IO;
-    using System.Diagnostics;
-    using System.Xml;
-    using System.Text;
-    using System.Collections;
-    using System.Diagnostics.CodeAnalysis;
-
 #pragma warning disable 618
 
     internal class BaseValidator

src/libraries/System.Private.Xml/src/System/Xml/Schema/CompiledidEntityConstraint.cs

@@ -1,14 +1,14 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Text;
+using System.Collections;
+using System.Diagnostics;
+using System.Xml.XPath;
+using MS.Internal.Xml.XPath;
+
 namespace System.Xml.Schema
 {
-    using System.Text;
-    using System.Collections;
-    using System.Diagnostics;
-    using System.Xml.XPath;
-    using MS.Internal.Xml.XPath;
-
     internal sealed class CompiledIdentityConstraint
     {
         internal XmlQualifiedName name = XmlQualifiedName.Empty;

src/libraries/System.Private.Xml/src/System/Xml/Schema/DataTypeImplementation.cs

@@ -1,20 +1,20 @@
 // 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.IO;
+using System.Collections;
+using System.Diagnostics;
+using System.Globalization;
+using System.Text;
+using System.Text.RegularExpressions;
+using System.Xml;
+using System.Xml.XPath;
+using System.Xml.Serialization;
+using System.Reflection;
+
 namespace System.Xml.Schema
 {
-    using System;
-    using System.IO;
-    using System.Collections;
-    using System.Diagnostics;
-    using System.Globalization;
-    using System.Text;
-    using System.Text.RegularExpressions;
-    using System.Xml;
-    using System.Xml.XPath;
-    using System.Xml.Serialization;
-    using System.Reflection;
-
     public enum XmlSchemaDatatypeVariety
     {
         Atomic,

src/libraries/System.Private.Xml/src/System/Xml/Schema/DtdValidator.cs

@@ -1,18 +1,18 @@
 // 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.Collections;
+using System.Text;
+using System.IO;
+using System.Net;
+using System.Diagnostics;
+using System.Xml.Schema;
+using System.Xml.XPath;
+using System.Diagnostics.CodeAnalysis;
+
 namespace System.Xml.Schema
 {
-    using System;
-    using System.Collections;
-    using System.Text;
-    using System.IO;
-    using System.Net;
-    using System.Diagnostics;
-    using System.Xml.Schema;
-    using System.Xml.XPath;
-    using System.Diagnostics.CodeAnalysis;
-
 #pragma warning disable 618
 
     internal sealed class DtdValidator : BaseValidator

src/libraries/System.Private.Xml/src/System/Xml/Schema/FacetChecker.cs

@@ -1,20 +1,20 @@
 // 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.ComponentModel;
+using System.Xml.Serialization;
+using System.Xml.Schema;
+using System.Xml.XPath;
+using System.Diagnostics;
+using System.Collections;
+using System.Text;
+using System.Text.RegularExpressions;
+using System.Threading;
+using System.Globalization;
+
 namespace System.Xml.Schema
 {
-    using System;
-    using System.ComponentModel;
-    using System.Xml.Serialization;
-    using System.Xml.Schema;
-    using System.Xml.XPath;
-    using System.Diagnostics;
-    using System.Collections;
-    using System.Text;
-    using System.Text.RegularExpressions;
-    using System.Threading;
-    using System.Globalization;
-
     internal abstract class FacetsChecker
     {
         private struct FacetsCompiler

src/libraries/System.Private.Xml/src/System/Xml/Schema/NamespaceList.cs

@@ -1,12 +1,12 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Collections;
+using System.Text;
+using System.Diagnostics;
+
 namespace System.Xml.Schema
 {
-    using System.Collections;
-    using System.Text;
-    using System.Diagnostics;
-
     internal class NamespaceList
     {
         public enum ListType

src/libraries/System.Private.Xml/src/System/Xml/Schema/Parser.cs

@@ -1,16 +1,16 @@
 // 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.Collections;
+using System.Globalization;
+using System.Text;
+using System.IO;
+using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
+
 namespace System.Xml.Schema
 {
-    using System;
-    using System.Collections;
-    using System.Globalization;
-    using System.Text;
-    using System.IO;
-    using System.Diagnostics;
-    using System.Diagnostics.CodeAnalysis;
-
     internal sealed partial class Parser
     {
         private SchemaType _schemaType;

src/libraries/System.Private.Xml/src/System/Xml/Schema/ParserAsync.cs

@@ -1,17 +1,17 @@
 // 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.Collections;
+using System.Globalization;
+using System.Text;
+using System.IO;
+using System.Diagnostics;
+
+using System.Threading.Tasks;
+
 namespace System.Xml.Schema
 {
-    using System;
-    using System.Collections;
-    using System.Globalization;
-    using System.Text;
-    using System.IO;
-    using System.Diagnostics;
-
-    using System.Threading.Tasks;
-
     internal sealed partial class Parser
     {
         public async Task StartParsingAsync(XmlReader reader, string? targetNamespace)

src/libraries/System.Private.Xml/src/System/Xml/Schema/Preprocessor.cs

@@ -1,16 +1,16 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Collections;
+using System.IO;
+using System.Threading;
+using System.Diagnostics;
+using System.Collections.Generic;
+using System.Runtime.Versioning;
+using System.Reflection;
+
 namespace System.Xml.Schema
 {
-    using System.Collections;
-    using System.IO;
-    using System.Threading;
-    using System.Diagnostics;
-    using System.Collections.Generic;
-    using System.Runtime.Versioning;
-    using System.Reflection;
-
     internal enum Compositor
     {
         Root,

src/libraries/System.Private.Xml/src/System/Xml/Schema/SchemaAttDef.cs

@@ -1,12 +1,12 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Diagnostics;
+using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
+
 namespace System.Xml.Schema
 {
-    using System.Diagnostics;
-    using System.Collections.Generic;
-    using System.Diagnostics.CodeAnalysis;
-
     /*
      * This class describes an attribute type and potential values.
      * This encapsulates the information for one Attdef * in an

src/libraries/System.Private.Xml/src/System/Xml/Schema/SchemaCollectionpreProcessor.cs

@@ -1,14 +1,14 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Collections;
+using System.Collections.Generic;
+using System.IO;
+using System.Diagnostics;
+using System.Runtime.Versioning;
+
 namespace System.Xml.Schema
 {
-    using System.Collections;
-    using System.Collections.Generic;
-    using System.IO;
-    using System.Diagnostics;
-    using System.Runtime.Versioning;
-
 #pragma warning disable 618
     internal sealed class SchemaCollectionPreprocessor : BaseProcessor
     {

src/libraries/System.Private.Xml/src/System/Xml/Schema/SchemaDeclBase.cs

@@ -1,12 +1,12 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
+
 namespace System.Xml.Schema
 {
-    using System.Collections.Generic;
-    using System.Diagnostics;
-    using System.Diagnostics.CodeAnalysis;
-
     internal abstract class SchemaDeclBase
     {
         internal enum Use

src/libraries/System.Private.Xml/src/System/Xml/Schema/SchemaElementDecl.cs

@@ -1,13 +1,13 @@
 // 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.Collections;
+using System.Diagnostics;
+using System.Collections.Generic;
+
 namespace System.Xml.Schema
 {
-    using System;
-    using System.Collections;
-    using System.Diagnostics;
-    using System.Collections.Generic;
-
     internal sealed class SchemaElementDecl : SchemaDeclBase, IDtdAttributeListInfo
     {
         private readonly Dictionary<XmlQualifiedName, SchemaAttDef> _attdefs = new Dictionary<XmlQualifiedName, SchemaAttDef>();

src/libraries/System.Private.Xml/src/System/Xml/Schema/SchemaEntity.cs

@@ -1,11 +1,11 @@
 // 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.Diagnostics;
+
 namespace System.Xml.Schema
 {
-    using System;
-    using System.Diagnostics;
-
     internal sealed class SchemaEntity : IDtdEntityInfo
     {
         private readonly XmlQualifiedName _qname;      // Name of entity

src/libraries/System.Private.Xml/src/System/Xml/Schema/SchemaNames.cs

@@ -1,11 +1,11 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Collections;
+using System.Diagnostics;
+
 namespace System.Xml.Schema
 {
-    using System.Collections;
-    using System.Diagnostics;
-
     internal sealed class SchemaNames
     {
         private readonly XmlNameTable _nameTable;

src/libraries/System.Private.Xml/src/System/Xml/Schema/SchemaNamespacemanager.cs

@@ -1,13 +1,13 @@
 // 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.Diagnostics;
+using System.Collections;
+using System.Collections.Generic;
+
 namespace System.Xml.Schema
 {
-    using System;
-    using System.Diagnostics;
-    using System.Collections;
-    using System.Collections.Generic;
-
     internal sealed class SchemaNamespaceManager : XmlNamespaceManager
     {
         private readonly XmlSchemaObject _node;

src/libraries/System.Private.Xml/src/System/Xml/Schema/SchemaNotation.cs

@@ -1,11 +1,11 @@
 // 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.Diagnostics;
+
 namespace System.Xml.Schema
 {
-    using System;
-    using System.Diagnostics;
-
     internal sealed class SchemaNotation
     {
         internal const int SYSTEM = 0;

src/libraries/System.Private.Xml/src/System/Xml/Schema/ValidationState.cs

@@ -1,13 +1,13 @@
 // 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.Collections;
+using System.Collections.Generic;
+using System.Runtime.InteropServices;
+
 namespace System.Xml.Schema
 {
-    using System;
-    using System.Collections;
-    using System.Collections.Generic;
-    using System.Runtime.InteropServices;
-
     [StructLayout(LayoutKind.Explicit)]
     internal struct StateUnion
     {

src/libraries/System.Private.Xml/src/System/Xml/Schema/XdrBuilder.cs

@@ -1,17 +1,17 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.IO;
+using System.Collections;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.ComponentModel;
+using System.Globalization;
+using System.Runtime.Versioning;
+using System.Diagnostics.CodeAnalysis;
+
 namespace System.Xml.Schema
 {
-    using System.IO;
-    using System.Collections;
-    using System.Collections.Generic;
-    using System.Diagnostics;
-    using System.ComponentModel;
-    using System.Globalization;
-    using System.Runtime.Versioning;
-    using System.Diagnostics.CodeAnalysis;
-
     /*
      * The XdrBuilder class parses the XDR Schema and
      * builds internal validation information

src/libraries/System.Private.Xml/src/System/Xml/Schema/XdrValidator.cs

@@ -1,16 +1,16 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.IO;
+using System.Text;
+using System.Collections;
+using System.Diagnostics;
+using System.Globalization;
+using System.Runtime.Versioning;
+using System.Diagnostics.CodeAnalysis;
+
 namespace System.Xml.Schema
 {
-    using System.IO;
-    using System.Text;
-    using System.Collections;
-    using System.Diagnostics;
-    using System.Globalization;
-    using System.Runtime.Versioning;
-    using System.Diagnostics.CodeAnalysis;
-
 #pragma warning disable 618
     internal sealed class XdrValidator : BaseValidator
     {

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchema.cs

@@ -1,17 +1,17 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.IO;
+using System.Collections;
+using System.ComponentModel;
+using System.Xml.Serialization;
+using System.Threading;
+using System.Diagnostics;
+using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
+
 namespace System.Xml.Schema
 {
-    using System.IO;
-    using System.Collections;
-    using System.ComponentModel;
-    using System.Xml.Serialization;
-    using System.Threading;
-    using System.Diagnostics;
-    using System.Collections.Generic;
-    using System.Diagnostics.CodeAnalysis;
-
     [XmlRoot("schema", Namespace = XmlSchema.Namespace)]
     public class XmlSchema : XmlSchemaObject
     {

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaAll.cs

@@ -1,11 +1,11 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Collections;
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Collections;
-    using System.Xml.Serialization;
-
     public class XmlSchemaAll : XmlSchemaGroupBase
     {
         private XmlSchemaObjectCollection _items = new XmlSchemaObjectCollection();

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaAnnotated.cs

@@ -1,11 +1,11 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Collections;
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Collections;
-    using System.Xml.Serialization;
-
     public class XmlSchemaAnnotated : XmlSchemaObject
     {
         private string? _id;

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaAnnotation.cs

@@ -1,11 +1,11 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Collections;
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Collections;
-    using System.Xml.Serialization;
-
     public class XmlSchemaAnnotation : XmlSchemaObject
     {
         private string? _id;

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaAny.cs

@@ -1,12 +1,12 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.ComponentModel;
+using System.Xml.Serialization;
+using System.Text;
+
 namespace System.Xml.Schema
 {
-    using System.ComponentModel;
-    using System.Xml.Serialization;
-    using System.Text;
-
     public class XmlSchemaAny : XmlSchemaParticle
     {
         private string? _ns;

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaAnyAttribute.cs

@@ -1,12 +1,12 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Collections;
+using System.ComponentModel;
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Collections;
-    using System.ComponentModel;
-    using System.Xml.Serialization;
-
     public class XmlSchemaAnyAttribute : XmlSchemaAnnotated
     {
         private string? _ns;

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaAppInfo.cs

@@ -1,11 +1,11 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Collections;
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Collections;
-    using System.Xml.Serialization;
-
     public class XmlSchemaAppInfo : XmlSchemaObject
     {
         private string? _source;

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaAttributeGroup.cs

@@ -1,11 +1,11 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Collections;
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Collections;
-    using System.Xml.Serialization;
-
     public class XmlSchemaAttributeGroup : XmlSchemaAnnotated
     {
         private string? _name;

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaAttributeGroupref.cs

@@ -1,12 +1,12 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Collections;
+using System.Diagnostics.CodeAnalysis;
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Collections;
-    using System.Diagnostics.CodeAnalysis;
-    using System.Xml.Serialization;
-
     public class XmlSchemaAttributeGroupRef : XmlSchemaAnnotated
     {
         private XmlQualifiedName _refName = XmlQualifiedName.Empty;

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaChoice.cs

@@ -1,11 +1,11 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Collections;
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Collections;
-    using System.Xml.Serialization;
-
     public class XmlSchemaChoice : XmlSchemaGroupBase
     {
         private XmlSchemaObjectCollection _items = new XmlSchemaObjectCollection();

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaCollection.cs

@@ -1,16 +1,15 @@
 // 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.Diagnostics.CodeAnalysis;
+using System.Threading;
+using System.Collections;
+using System.Xml.Schema;
+using System.Runtime.Versioning;
+
 namespace System.Xml.Schema
 {
-    using System;
-    using System.Diagnostics.CodeAnalysis;
-    using System.Threading;
-    using System.Collections;
-    using System.Xml.Schema;
-    using System.Runtime.Versioning;
-
-
     /// <summary>
     /// The XmlSchemaCollection contains a set of namespace URI's.
     /// Each namespace also have an associated private data cache

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaComplexContent.cs

@@ -1,10 +1,10 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Xml.Serialization;
-
     public class XmlSchemaComplexContent : XmlSchemaContentModel
     {
         private XmlSchemaContent? _content;

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaComplexContentExtension.cs

@@ -1,11 +1,11 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Collections;
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Collections;
-    using System.Xml.Serialization;
-
     public class XmlSchemaComplexContentExtension : XmlSchemaContent
     {
         private XmlSchemaParticle? _particle;

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaComplexContentRestriction.cs

@@ -1,11 +1,11 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Collections;
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Collections;
-    using System.Xml.Serialization;
-
     public class XmlSchemaComplexContentRestriction : XmlSchemaContent
     {
         private XmlSchemaParticle? _particle;

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaContent.cs

@@ -1,11 +1,11 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Collections;
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Collections;
-    using System.Xml.Serialization;
-
     public abstract class XmlSchemaContent : XmlSchemaAnnotated
     {
     }

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaContentModel.cs

@@ -1,10 +1,10 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Xml.Serialization;
-
     public abstract class XmlSchemaContentModel : XmlSchemaAnnotated
     {
         [XmlIgnore]

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaContentProcessing.cs

@@ -1,10 +1,10 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Xml.Serialization;
-
     public enum XmlSchemaContentProcessing
     {
         [XmlIgnore]

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaDerivationMethod.cs

@@ -1,12 +1,12 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Collections;
+using System.ComponentModel;
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Collections;
-    using System.ComponentModel;
-    using System.Xml.Serialization;
-
     [Flags]
     public enum XmlSchemaDerivationMethod
     {

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaDocumentation.cs

@@ -1,13 +1,13 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Collections;
+using System.ComponentModel;
+using System.Diagnostics.CodeAnalysis;
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Collections;
-    using System.ComponentModel;
-    using System.Diagnostics.CodeAnalysis;
-    using System.Xml.Serialization;
-
     public class XmlSchemaDocumentation : XmlSchemaObject
     {
         private string? _source;

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaExternal.cs

@@ -1,12 +1,12 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Collections;
+using System.ComponentModel;
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Collections;
-    using System.ComponentModel;
-    using System.Xml.Serialization;
-
     public abstract class XmlSchemaExternal : XmlSchemaObject
     {
         private string? _location;

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaFacet.cs

@@ -1,11 +1,11 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.ComponentModel;
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.ComponentModel;
-    using System.Xml.Serialization;
-
     internal enum FacetType
     {
         None,

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaForm.cs

@@ -1,10 +1,10 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Xml.Serialization;
-
     // if change the enum, have to change xsdbuilder as well.
     /// <devdoc>
     ///    <para>[To be supplied.]</para>

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaGroup.cs

@@ -1,10 +1,10 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Xml.Serialization;
-
     public class XmlSchemaGroup : XmlSchemaAnnotated
     {
         private string? _name;

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaGroupBase.cs

@@ -1,10 +1,10 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Xml.Serialization;
-
     public abstract class XmlSchemaGroupBase : XmlSchemaParticle
     {
         internal XmlSchemaGroupBase() { }

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaGroupRef.cs

@@ -1,10 +1,10 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Xml.Serialization;
-
     public class XmlSchemaGroupRef : XmlSchemaParticle
     {
         private XmlQualifiedName _refName = XmlQualifiedName.Empty;

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaIdEntityConstraint.cs

@@ -1,12 +1,12 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Collections;
+using System.ComponentModel;
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Collections;
-    using System.ComponentModel;
-    using System.Xml.Serialization;
-
     public class XmlSchemaIdentityConstraint : XmlSchemaAnnotated
     {
         private string? _name;

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaImport.cs

@@ -1,10 +1,10 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Xml.Serialization;
-
     public class XmlSchemaImport : XmlSchemaExternal
     {
         private string? _ns;

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaInclude.cs

@@ -1,10 +1,10 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Xml.Serialization;
-
     public class XmlSchemaInclude : XmlSchemaExternal
     {
         private XmlSchemaAnnotation? _annotation;

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaNotation.cs

@@ -1,10 +1,10 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Xml.Serialization;
-
     public class XmlSchemaNotation : XmlSchemaAnnotated
     {
         private string? _name;

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaObject.cs

@@ -1,11 +1,11 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Diagnostics;
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Diagnostics;
-    using System.Xml.Serialization;
-
     public abstract class XmlSchemaObject
     {
         private int _lineNum;

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaObjectCollection.cs

@@ -1,12 +1,12 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Collections;
+using System.ComponentModel;
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Collections;
-    using System.ComponentModel;
-    using System.Xml.Serialization;
-
     public class XmlSchemaObjectCollection : CollectionBase
     {
         private readonly XmlSchemaObject? _parent;

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaObjectTable.cs

@@ -1,12 +1,12 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Collections;
+using System.Collections.Generic;
+using System.Diagnostics;
+
 namespace System.Xml.Schema
 {
-    using System.Collections;
-    using System.Collections.Generic;
-    using System.Diagnostics;
-
     public class XmlSchemaObjectTable
     {
         private readonly Dictionary<XmlQualifiedName, XmlSchemaObject> _table = new Dictionary<XmlQualifiedName, XmlSchemaObject>();

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaParticle.cs

@@ -1,10 +1,10 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Xml.Serialization;
-
     public abstract class XmlSchemaParticle : XmlSchemaAnnotated
     {
         [Flags]

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaRedefine.cs

@@ -1,10 +1,10 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Xml.Serialization;
-
     public class XmlSchemaRedefine : XmlSchemaExternal
     {
         private readonly XmlSchemaObjectCollection _items = new XmlSchemaObjectCollection();

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaSequence.cs

@@ -1,10 +1,10 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Xml.Serialization;
-
     public class XmlSchemaSequence : XmlSchemaGroupBase
     {
         private XmlSchemaObjectCollection _items = new XmlSchemaObjectCollection();

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaSimpleContent.cs

@@ -1,10 +1,10 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Xml.Serialization;
-
     public class XmlSchemaSimpleContent : XmlSchemaContentModel
     {
         private XmlSchemaContent? _content;

src/libraries/System.Private.Xml/src/System/Xml/Schema/XmlSchemaSimpleContentExtension.cs

@@ -1,10 +1,10 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Xml.Serialization;
+
 namespace System.Xml.Schema
 {
-    using System.Xml.Serialization;
-
     public class XmlSchemaSimpleContentExtension : XmlSchemaContent
     {
         private XmlSchemaObjectCollection _attributes = new XmlSchemaObjectCollection();