Fix the Fast Up-To-Date check for Roslyn.sln

build/Targets/Imports.targets

@@ -2,7 +2,10 @@
 <!-- Copyright (c)  Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information. -->
 <Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
-  
+  <PropertyGroup>
+    <MSBuildAllProjects>$(MSBuildAllProjects);$(MSBuildThisFileFullPath)</MSBuildAllProjects>
+  </PropertyGroup>
+
   <PropertyGroup>
     <RoslynPublicKey>0024000004800000940000000602000000240000525341310004000001000100b5fc90e7027f67871e773a8fde8938c81dd402ba65b9201d60593e96c492651e889cc13f1415ebb53fac1131ae0bd333c5ee6021672d9718ea31a8aebd0da0072f25d87dba6fc90ffd598ed4da35e44c398c454307e8e33b8426143daec9f596836f97c8f74750e5975c64e2189f45def46b2a2b1247adc3652bf5c308055da9</RoslynPublicKey>
     <RoslynInternalKey>002400000480000094000000060200000024000052534131000400000100010055e0217eb635f69281051f9a823e0c7edd90f28063eb6c7a742a19b4f6139778ee0af438f47aed3b6e9f99838aa8dba689c7a71ddb860c96d923830b57bbd5cd6119406ddb9b002cf1c723bf272d6acbb7129e9d6dd5a5309c94e0ff4b2c884d45a55f475cd7dba59198086f61f5a8c8b5e601c0edbf269733f6f578fc8579c2</RoslynInternalKey>
@@ -272,7 +275,7 @@
        ==================================================================================== -->
 
   <PropertyGroup>
-    <PrepareForBuildDependsOn>RemoveDuplicateXUnitContent;RestoreToolsetCheck;$(PrepareForBuildDependsOn)</PrepareForBuildDependsOn>
+    <PrepareForBuildDependsOn>RestoreToolsetCheck;$(PrepareForBuildDependsOn)</PrepareForBuildDependsOn>
     <TargetFrameworkMonikerAssemblyAttributesPath>$(IntermediateOutputPath)$(TargetFrameworkMoniker).AssemblyAttributes$(DefaultLanguageSourceExtension)</TargetFrameworkMonikerAssemblyAttributesPath>
     <PostCompileBinaryModificationSentinelFile>$(IntermediateOutputPath)$(TargetFileName).pcbm</PostCompileBinaryModificationSentinelFile>
     <OptimizationDataFolderPath>$(NuGetPackageRoot)\RoslynDependencies.OptimizationData\$(RoslynDependenciesOptimizationDataVersion)\content\OptimizationData</OptimizationDataFolderPath>
@@ -368,11 +371,9 @@
 
     https://github.com/dotnet/roslyn/issues/18753
   -->
-  <Target Name="RemoveDuplicateXUnitContent">
-      <ItemGroup>
-        <None Remove="@(None)" Condition="'%(Filename)%(Extension)' == 'xunit.abstractions.dll'" />
-    </ItemGroup>
-  </Target>
+  <ItemGroup>
+    <None Remove="$(NuGetPackageFolders)xunit.runner.visualstudio\$(xunitrunnervisualstudioVersion)\build\net20\..\_common\xunit.abstractions.dll" />
+  </ItemGroup>
 
   <!-- We need to run publish on our CoreCLR executables (CscCore and VbcCore) without rebuilding
        since a rebuild may overwrite signed binaries in the output directory with unsigned binaries