dotnet · ViktorHofer · Nov 22, 2022 · Nov 22, 2022 · Nov 22, 2022 · Nov 22, 2022
diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
@@ -106,9 +106,9 @@
       <Uri>https://github.com/dotnet/arcade</Uri>
       <Sha>80b6be47e1425ea90c5febffac119250043a0c92</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.GenFacades" Version="8.0.0-beta.22554.2">
+    <Dependency Name="Microsoft.DotNet.GenFacades" Version="8.0.0-beta.22572.2">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>80b6be47e1425ea90c5febffac119250043a0c92</Sha>
+      <Sha>fc4ba340496ca0e45d51914f8f1606c60e3c75c6</Sha>
     </Dependency>
     <Dependency Name="Microsoft.DotNet.XUnitExtensions" Version="8.0.0-beta.22554.2">
       <Uri>https://github.com/dotnet/arcade</Uri>

diff --git a/eng/Versions.props b/eng/Versions.props
@@ -85,7 +85,7 @@
     <MicrosoftDotNetBuildTasksFeedVersion>8.0.0-beta.22554.2</MicrosoftDotNetBuildTasksFeedVersion>
     <MicrosoftDotNetCodeAnalysisVersion>8.0.0-beta.22554.2</MicrosoftDotNetCodeAnalysisVersion>
     <MicrosoftDotNetGenAPIVersion>8.0.0-beta.22554.2</MicrosoftDotNetGenAPIVersion>
-    <MicrosoftDotNetGenFacadesVersion>8.0.0-beta.22554.2</MicrosoftDotNetGenFacadesVersion>
+    <MicrosoftDotNetGenFacadesVersion>8.0.0-beta.22572.2</MicrosoftDotNetGenFacadesVersion>
     <MicrosoftDotNetXUnitExtensionsVersion>8.0.0-beta.22554.2</MicrosoftDotNetXUnitExtensionsVersion>
     <MicrosoftDotNetXUnitConsoleRunnerVersion>2.5.1-beta.22554.2</MicrosoftDotNetXUnitConsoleRunnerVersion>
     <MicrosoftDotNetBuildTasksArchivesVersion>8.0.0-beta.22554.2</MicrosoftDotNetBuildTasksArchivesVersion>

diff --git a/eng/resolveContract.props b/eng/resolveContract.props
diff --git a/eng/resolveContract.targets b/eng/resolveContract.targets
@@ -1,72 +1,40 @@
 <Project>
-  <PropertyGroup>
-    <ApiCompatContractItemName>ResolvedMatchingContract</ApiCompatContractItemName>
-    <ApiCompatStrictMode Condition="'$(ApiCompatStrictMode)' == ''">true</ApiCompatStrictMode>
-    <_ApiCompatCaptureGroupPattern>.+%5C$([System.IO.Path]::DirectorySeparatorChar)(.+)%5C$([System.IO.Path]::DirectorySeparatorChar)(.+)</_ApiCompatCaptureGroupPattern>
-    <_ApiCompatRuntimePrefixPattern>(.+)/(net%5Cd.%5Cd)-(.+)/(.+)</_ApiCompatRuntimePrefixPattern>
-    <_ApiCompatLibReplacementString>lib/$1/$2</_ApiCompatLibReplacementString>
-    <!-- CoreLib source projects have different output paths. -->
-    <_ApiCompatLibReplacementString Condition="'$(MSBuildProjectName)' == 'System.Private.CoreLib'">lib/$(NetCoreAppCurrent)/$2</_ApiCompatLibReplacementString>
-
-    <GenAPIExcludeAttributesList>$(RepositoryEngineeringDir)DefaultGenApiDocIds.txt</GenAPIExcludeAttributesList>
-    <GenAPIHeaderFile>$(RepositoryEngineeringDir)LicenseHeader.txt</GenAPIHeaderFile>
-    <GenAPITargetPath>$([MSBuild]::NormalizePath('$(MSBuildProjectDirectory)', '..', 'ref', '$(AssemblyName).cs'))</GenAPITargetPath>
-    <GenAPILangVersion Condition="'$(LangVersion)' != ''">$(LangVersion)</GenAPILangVersion>
-    <ProjectForGenAPIDocIdGeneration Condition="'$(IsSourceProject)' == 'true' and '$(ProjectForGenAPIDocIdGeneration)' == ''">$(CoreLibProject)</ProjectForGenAPIDocIdGeneration>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <!-- Transform the API Compat assemblies passed in to log-able strings. -->
-    <ApiCompatLeftAssembliesTransformationPattern Include="$(_ApiCompatCaptureGroupPattern)" ReplacementString="ref/$1/$2" />
-    <ApiCompatLeftAssembliesTransformationPattern Include="$(_ApiCompatRuntimePrefixPattern)" ReplacementString="runtimes/$3/$1/$2/$4" />
-    <ApiCompatLeftAssembliesTransformationPattern Include="runtimes/windows/" ReplacementString="runtimes/win/" />
-
-    <ApiCompatRightAssembliesTransformationPattern Include="$(_ApiCompatCaptureGroupPattern)" ReplacementString="$(_ApiCompatLibReplacementString)" />
-    <ApiCompatRightAssembliesTransformationPattern Include="$(_ApiCompatRuntimePrefixPattern)" ReplacementString="runtimes/$3/$1/$2/$4" />
-    <ApiCompatRightAssembliesTransformationPattern Include="runtimes/windows/" ReplacementString="runtimes/win/" />
+  <!--
+    ##### Contract project settings #####
+    - Allows referencing contract projects for passing matching reference assemblies to tooling like ApiCompat.
+    - Allows building against contract assemblies when referencing source projects.
+    - Allows building against source assemblies instead when the 'SkipUseReferenceAssembly' attribute is present on ProjectReference items.
+  -->
 
-    <!-- Fall back to the targeting pack dir for NetCoreAppCurrent to avoid passing through dependencies from ref to src. -->
-    <ApiCompatContractAssemblyReferences Include="$(MicrosoftNetCoreAppRefPackRefDir)"
-                                         Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', '$(NetCoreAppCurrent)'))" />
-  </ItemGroup>
-
-  <PropertyGroup Condition="'$(IsSourceProject)' == 'true'">
+  <PropertyGroup>
     <ContractProject Condition="'$(ContractProject)' == ''">$(LibrariesProjectRoot)$(MSBuildProjectName)\ref\$(MSBuildProjectName).csproj</ContractProject>
     <HasMatchingContract Condition="'$(HasMatchingContract)' == '' and Exists('$(ContractProject)')">true</HasMatchingContract>
+    <!-- Don't build against reference assemblies when projects are packable and the tfm is not the latest .NETCoreApp as
+         such reference assemblies don't ship to customers and only exist for tooling scenarios. -->
+    <AnnotateTargetPathWithContract Condition="'$(AnnotateTargetPathWithContract)' == '' and
+                                               '$(HasMatchingContract)' == 'true' and
+                                               (
+                                                '$(IsPackable)' != 'true' or
+                                                (
+                                                 '$(TargetFrameworkIdentifier)' == '.NETCoreApp' and
+                                                 '$(TargetFrameworkVersion)' == 'v$(NetCoreAppCurrentVersion)'
+                                                )
+                                               )">true</AnnotateTargetPathWithContract>
   </PropertyGroup>
 
-  <PropertyGroup Condition="'$(IsSourceProject)' == 'true' and '$(IsCrossTargetingBuild)' != 'true'">
-    <!-- Disable API compat if the project doesn't have reference assembly -->
-    <ApiCompatValidateAssemblies Condition="'$(HasMatchingContract)' != 'true'">false</ApiCompatValidateAssemblies>
-    <!-- TODO: Move into Microsoft.DotNet.GenFacadesNotSupported.targets. -->
-    <!-- Not supported sources are created from the ref assembly, we currently don't produce finalizers in dummy assemblies, so we disable ApiCompat to not fail. -->
-    <ApiCompatValidateAssemblies Condition="'$(GeneratePlatformNotSupportedAssemblyMessage)' != ''">false</ApiCompatValidateAssemblies>
-  </PropertyGroup>
-
-    <!-- Use the apicompat task package instead of the in-built SDK functionality to consume newer features. -->
-  <ItemGroup Condition="'$(EnablePackageValidation)' == 'true' or
-                        '$(ApiCompatValidateAssemblies)' == 'true'">
-    <PackageReference Include="Microsoft.DotNet.ApiCompat.Task" Version="$(MicrosoftDotNetApiCompatTaskVersion)" PrivateAssets="all" IsImplicitlyDefined="true" />
-  </ItemGroup>
-
-  <ItemGroup Condition="'$(HasMatchingContract)' == 'true' and '$(ContractProject)' != '' and '@(ResolvedMatchingContract)' == ''">
+  <ItemGroup Condition="'$(HasMatchingContract)' == 'true' and '$(ContractProject)' != ''">
     <ProjectReference Include="$(ContractProject)" ReferenceOutputAssembly="false" OutputItemType="ResolvedMatchingContract" />
     <!-- We aren't referencing the contract, but make sure it's considered as an input to Compile so that if it changes we rebuild and rerun API compat -->
     <ProjectReference Include="$(ContractProject)" ReferenceOutputAssembly="false" OutputItemType="CustomAdditionalCompileInputs" />
   </ItemGroup>
-  <!-- intentionally empty since we no longer need a target -->
-  <Target Name="ResolveMatchingContract" />
 
   <!-- Allow P2Ps that target a source project to build against the corresponding ref project. -->
   <Target Name="AnnotateTargetPathWithTargetPlatformMonikerWithReferenceAssembly"
-          Condition="'$(HasMatchingContract)' == 'true'"
+          Condition="'$(AnnotateTargetPathWithContract)' == 'true'"
           DependsOnTargets="ResolveProjectReferences"
           AfterTargets="GetTargetPathWithTargetPlatformMoniker">
     <ItemGroup>
-      <!-- Allow to point to a different reference project than what GenFacades uses to generate the type forwards. -->
-      <TargetPathWithTargetPlatformMoniker ReferenceAssembly="@(ResolvedMatchingContractOverride)" />
-      <TargetPathWithTargetPlatformMoniker ReferenceAssembly="@(ResolvedMatchingContract)"
-                                           Condition="'@(ResolvedMatchingContractOverride)' == ''" />
+      <TargetPathWithTargetPlatformMoniker ReferenceAssembly="@(ResolvedMatchingContract)" />
     </ItemGroup>
   </Target>
 
@@ -89,6 +57,76 @@
     </ItemGroup>
   </Target>
 
+  <!-- ##### APICompat settings ##### -->
+
+  <PropertyGroup>
+    <ApiCompatContractItemName>ResolvedMatchingContract</ApiCompatContractItemName>
+    <ApiCompatStrictMode Condition="'$(ApiCompatStrictMode)' == ''">true</ApiCompatStrictMode>
+
+    <!-- Optional rules -->
+    <ApiCompatEnableRuleAttributesMustMatch>true</ApiCompatEnableRuleAttributesMustMatch>
+    <ApiCompatEnableRuleCannotChangeParameterName>true</ApiCompatEnableRuleCannotChangeParameterName>
+
+    <_ApiCompatCaptureGroupPattern>.+%5C$([System.IO.Path]::DirectorySeparatorChar)(.+)%5C$([System.IO.Path]::DirectorySeparatorChar)(.+)</_ApiCompatCaptureGroupPattern>
+    <_ApiCompatRuntimePrefixPattern>(.+)/(net%5Cd.%5Cd)-(.+)/(.+)</_ApiCompatRuntimePrefixPattern>
+    <_ApiCompatLibReplacementString>lib/$1/$2</_ApiCompatLibReplacementString>
+    <!-- CoreLib source projects have different output paths. -->
+    <_ApiCompatLibReplacementString Condition="'$(MSBuildProjectName)' == 'System.Private.CoreLib'">lib/$(NetCoreAppCurrent)/$2</_ApiCompatLibReplacementString>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(IsCrossTargetingBuild)' != 'true'">
+    <!-- Disable API compat if the project doesn't have a reference assembly. -->
+    <ApiCompatValidateAssemblies Condition="'$(HasMatchingContract)' != 'true'">false</ApiCompatValidateAssemblies>
+    <!-- TODO: Move into Microsoft.DotNet.GenFacadesNotSupported.targets. -->
+    <!-- Not supported sources are created from the ref assembly, we currently don't produce finalizers in dummy assemblies, so we disable ApiCompat to not fail. -->
+    <ApiCompatValidateAssemblies Condition="'$(GeneratePlatformNotSupportedAssemblyMessage)' != ''">false</ApiCompatValidateAssemblies>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ApiCompatExcludeAttributesFile Include="$(RepositoryEngineeringDir)DefaultGenApiDocIds.txt" />
+    <ApiCompatExcludeAttributesFile Include="$(RepositoryEngineeringDir)ApiCompatExcludeAttributes.txt" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <!-- Transform the API Compat assemblies passed in to log-able strings. -->
+    <ApiCompatLeftAssembliesTransformationPattern Include="$(_ApiCompatCaptureGroupPattern)" ReplacementString="ref/$1/$2" />
+    <ApiCompatLeftAssembliesTransformationPattern Include="$(_ApiCompatRuntimePrefixPattern)" ReplacementString="runtimes/$3/$1/$2/$4" />
+    <ApiCompatLeftAssembliesTransformationPattern Include="runtimes/windows/" ReplacementString="runtimes/win/" />
+
+    <ApiCompatRightAssembliesTransformationPattern Include="$(_ApiCompatCaptureGroupPattern)" ReplacementString="$(_ApiCompatLibReplacementString)" />
+    <ApiCompatRightAssembliesTransformationPattern Include="$(_ApiCompatRuntimePrefixPattern)" ReplacementString="runtimes/$3/$1/$2/$4" />
+    <ApiCompatRightAssembliesTransformationPattern Include="runtimes/windows/" ReplacementString="runtimes/win/" />
+
+    <!-- Fall back to the targeting pack dir for NetCoreAppCurrent to avoid passing through dependencies from ref to src. -->
+    <ApiCompatContractAssemblyReferences Include="$(MicrosoftNetCoreAppRefPackRefDir)"
+                                         Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', '$(NetCoreAppCurrent)'))" />
+  </ItemGroup>
+
+    <!-- Use the apicompat task package instead of the in-built SDK functionality to consume newer features. -->
+  <ItemGroup Condition="'$(EnablePackageValidation)' == 'true' or
+                        '$(ApiCompatValidateAssemblies)' == 'true'">
+    <PackageReference Include="Microsoft.DotNet.ApiCompat.Task" Version="$(MicrosoftDotNetApiCompatTaskVersion)" PrivateAssets="all" IsImplicitlyDefined="true" />
+  </ItemGroup>
+
+  <!-- ##### GenAPI settings ##### -->
+
+  <PropertyGroup>
+    <GenAPIExcludeAttributesList>$(RepositoryEngineeringDir)DefaultGenApiDocIds.txt</GenAPIExcludeAttributesList>
+    <GenAPIHeaderFile>$(RepositoryEngineeringDir)LicenseHeader.txt</GenAPIHeaderFile>
+    <GenAPITargetPath>$([MSBuild]::NormalizePath('$(MSBuildProjectDirectory)', '..', 'ref', '$(AssemblyName).cs'))</GenAPITargetPath>
+    <GenAPILangVersion Condition="'$(LangVersion)' != ''">$(LangVersion)</GenAPILangVersion>
+    <ProjectForGenAPIDocIdGeneration Condition="'$(ProjectForGenAPIDocIdGeneration)' == ''">$(CoreLibProject)</ProjectForGenAPIDocIdGeneration>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <!-- GenAPI is currently only invoked on demand and not used as part of the build as it isn't source build compatible. -->
+    <PackageReference Include="Microsoft.DotNet.GenAPI"
+                      Version="$(MicrosoftDotNetGenApiVersion)"
+                      PrivateAssets="all"
+                      IsImplicitlyDefined="true"
+                      Condition="'$(DotNetBuildFromSource)' != 'true'" />
+  </ItemGroup>
+
   <!-- Generate a .txt file with all public types of the project referenced by ProjectForGenAPIDocIdGeneration (e.g. System.Private.CoreLib or System.Private.Uri implementation assembly).
        This file is then later on passed to GenAPI as the list of types which should be "split out" with the conditional compilation logic. -->
   <Target Name="GenerateConditionalTypeLists"

diff --git a/src/coreclr/System.Private.CoreLib/System.Private.CoreLib.csproj b/src/coreclr/System.Private.CoreLib/System.Private.CoreLib.csproj
@@ -348,8 +348,7 @@
 
   <!-- Import refererence assembly and ApiCompat logic -->
   <PropertyGroup>
-    <IsSourceProject>true</IsSourceProject>
+    <ApiCompatValidateAssemblies>true</ApiCompatValidateAssemblies>
   </PropertyGroup>
-  <Import Project="$(RepositoryEngineeringDir)resolveContract.props" />
   <Import Project="$(RepositoryEngineeringDir)resolveContract.targets" />
 </Project>
@@ -608,8 +608,7 @@
 
   <!-- Import refererence assembly and ApiCompat logic -->
   <PropertyGroup>
-    <IsSourceProject>true</IsSourceProject>
+    <ApiCompatValidateAssemblies>true</ApiCompatValidateAssemblies>
   </PropertyGroup>
-  <Import Project="$(RepositoryEngineeringDir)resolveContract.props" />
   <Import Project="$(RepositoryEngineeringDir)resolveContract.targets" />
 </Project>
diff --git a/src/libraries/Directory.Build.props b/src/libraries/Directory.Build.props
@@ -70,7 +70,6 @@
 
   <Import Project="NetCoreAppLibrary.props" />
   <Import Project="$(RepositoryEngineeringDir)referenceAssemblies.props" Condition="'$(IsReferenceAssemblyProject)' == 'true'" />
-  <Import Project="$(RepositoryEngineeringDir)resolveContract.props" />
 
   <PropertyGroup>
     <!-- Default any assembly not specifying a key to use the Open Key -->
@@ -84,6 +83,7 @@
 
   <!-- Language configuration -->
   <PropertyGroup>
+    <ApiCompatValidateAssemblies Condition="'$(IsSourceProject)' == 'true'">true</ApiCompatValidateAssemblies>
     <GenFacadesIgnoreBuildAndRevisionMismatch>true</GenFacadesIgnoreBuildAndRevisionMismatch>
     <!-- Disable analyzers for tests and unsupported projects -->
     <RunAnalyzers Condition="'$(IsTestProject)' != 'true' and '$(IsSourceProject)' != 'true' and '$(IsGeneratorProject)' != 'true'">false</RunAnalyzers>

diff --git a/src/libraries/Directory.Build.targets b/src/libraries/Directory.Build.targets
@@ -125,7 +125,7 @@
 
   <Import Project="$(RepositoryEngineeringDir)codeOptimization.targets" />
   <Import Project="$(RepositoryEngineeringDir)references.targets" />
-  <Import Project="$(RepositoryEngineeringDir)resolveContract.targets" />
+  <Import Project="$(RepositoryEngineeringDir)resolveContract.targets" Condition="'$(IsSourceProject)' == 'true'" />
   <Import Project="$(RepositoryEngineeringDir)testing\tests.targets" Condition="'$(EnableTestSupport)' == 'true'" />
   <Import Project="$(RepositoryEngineeringDir)testing\linker\trimmingTests.targets" Condition="'$(IsPublishedAppTestProject)' == 'true'" />
   <Import Project="$(RepositoryEngineeringDir)testing\runtimeConfiguration.targets" />
@@ -141,11 +141,16 @@
     <PackageReference Include="Microsoft.DotNet.Build.Tasks.TargetFramework" Version="$(MicrosoftDotNetBuildTasksTargetFrameworkVersion)" PrivateAssets="all" IsImplicitlyDefined="true" />
   </ItemGroup>
 
-  <ItemGroup Condition="'$(IsSourceProject)' == 'true' or '$(IsReferenceAssemblyProject)' == 'true' or '$(IsPartialFacadeAssembly)' == 'true'">
-    <PackageReference Include="Microsoft.DotNet.GenAPI" Condition="'$(DotNetBuildFromSource)' != 'true'" Version="$(MicrosoftDotNetGenApiVersion)" PrivateAssets="all" IsImplicitlyDefined="true" />
+  <!-- Reference the GenFacades package when the assembly is a partial facade or a PNSE throwing. -->
+  <ItemGroup Condition="'$(IsPartialFacadeAssembly)' == 'true' or
+                        '$(GeneratePlatformNotSupportedAssembly)' == 'true' or
+                        '$(GeneratePlatformNotSupportedAssemblyMessage)' != ''">
     <PackageReference Include="Microsoft.DotNet.GenFacades" Version="$(MicrosoftDotNetGenFacadesVersion)" PrivateAssets="all" IsImplicitlyDefined="true" />
   </ItemGroup>
 
+  <!-- GenFacades target that is intentionally empty since we no longer need it. -->
+  <Target Name="ResolveMatchingContract" />
+
   <!--
     Do not clean binplace assets in the ref targeting pack to avoid incremental build failures
     when the SDK tries to resolve the assets from the FrameworkList.

diff --git a/src/libraries/System.DirectoryServices/src/ILLink/ILLink.Suppressions.xml b/src/libraries/System.DirectoryServices/src/ILLink/ILLink.Suppressions.xml
@@ -5,7 +5,7 @@
       <argument>ILLink</argument>
       <argument>IL2050</argument>
       <property name="Scope">member</property>
-      <property name="Target">M:System.DirectoryServices.Interop.UnsafeNativeMethods.ADsOpenObject(System.String,System.String,System.String,System.Int32,System.Guid@,System.Object@)</property>
+      <property name="Target">M:System.DirectoryServices.UnsafeNativeMethods.ADsOpenObject(System.String,System.String,System.String,System.Int32,System.Guid@,System.Object@)</property>
     </attribute>
     <attribute fullname="System.Diagnostics.CodeAnalysis.UnconditionalSuppressMessageAttribute">
       <argument>ILLink</argument>

diff --git a/src/libraries/System.DirectoryServices/src/Interop/AdsOptions.cs b/src/libraries/System.DirectoryServices/src/Interop/AdsOptions.cs
@@ -1,7 +1,7 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
-namespace System.DirectoryServices.Interop
+namespace System.DirectoryServices
 {
     internal enum AdsOptions
     {

diff --git a/src/libraries/System.DirectoryServices/src/Interop/AdsPropertyOperation.cs b/src/libraries/System.DirectoryServices/src/Interop/AdsPropertyOperation.cs
@@ -1,7 +1,7 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
-namespace System.DirectoryServices.Interop
+namespace System.DirectoryServices
 {
     internal enum AdsPropertyOperation
     {

diff --git a/src/libraries/System.DirectoryServices/src/Interop/AdsSearchColumn.cs b/src/libraries/System.DirectoryServices/src/Interop/AdsSearchColumn.cs
@@ -3,7 +3,7 @@
 
 using System.Runtime.InteropServices;
 
-namespace System.DirectoryServices.Interop
+namespace System.DirectoryServices
 {
     [StructLayout(LayoutKind.Sequential)]
     internal unsafe struct AdsSearchColumn

diff --git a/src/libraries/System.DirectoryServices/src/Interop/AdsSearchPreferenceInfo.cs b/src/libraries/System.DirectoryServices/src/Interop/AdsSearchPreferenceInfo.cs
@@ -3,7 +3,7 @@
 
 using System.Runtime.InteropServices;
 
-namespace System.DirectoryServices.Interop
+namespace System.DirectoryServices
 {
     [StructLayout(LayoutKind.Sequential)]
     internal struct AdsSearchPreferenceInfo

diff --git a/src/libraries/System.DirectoryServices/src/Interop/AdsSearchPreferences.cs b/src/libraries/System.DirectoryServices/src/Interop/AdsSearchPreferences.cs
@@ -1,7 +1,7 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
-namespace System.DirectoryServices.Interop
+namespace System.DirectoryServices
 {
     internal enum AdsSearchPreferences
     {