Use Dependencies.props to find ref assemblies

build/Targets/Dependencies.props

@@ -31,6 +31,7 @@
     <MicrosoftVisualStudioInteractiveWindowVersion>2.0.0-rc3-61304-01</MicrosoftVisualStudioInteractiveWindowVersion>
     <MicrosoftVisualStudioVsInteractiveWindowVersion>2.0.0-rc3-61304-01</MicrosoftVisualStudioVsInteractiveWindowVersion>
     <MicrosoftVSSDKBuildToolsVersion>15.0.26124-RC3</MicrosoftVSSDKBuildToolsVersion>
+    <NETStandardLibraryVersion>2.0.0-beta-25123-01</NETStandardLibraryVersion>
     <RoslynToolsMicrosoftLocateVSVersion>0.2.4-beta</RoslynToolsMicrosoftLocateVSVersion>
     <RoslynToolsMicrosoftSignToolVersion>0.3.0-beta</RoslynToolsMicrosoftSignToolVersion>
     <RoslynToolsMicrosoftVSIXExpInstallerVersion>0.2.4-beta</RoslynToolsMicrosoftVSIXExpInstallerVersion>
@@ -99,11 +100,10 @@
     <SystemXmlReaderWriterVersion>4.3.0</SystemXmlReaderWriterVersion>
     <SystemXmlXDocumentVersion>4.3.0</SystemXmlXDocumentVersion>
     <SystemXmlXmlDocumentVersion>4.3.0</SystemXmlXmlDocumentVersion>
-    <SystemXmlXmlSerializerVersion>4.3.0</SystemXmlXmlSerializerVersion>
     <SystemXmlXPathXDocumentVersion>4.3.0</SystemXmlXPathXDocumentVersion>
     <xunitVersion>2.2.0-beta4-build3444</xunitVersion>
     <xunitconsolenetcoreVersion>1.0.2-prerelease-00104</xunitconsolenetcoreVersion>
     <xunitrunnerconsoleVersion>2.2.0-beta4-build3444</xunitrunnerconsoleVersion>
     <xunitrunnervisualstudioVersion>2.2.0-beta4-build1194</xunitrunnervisualstudioVersion>
   </PropertyGroup>
-</Project>
+</Project>
\ No newline at end of file

build/Targets/Settings.props

@@ -31,10 +31,7 @@
     <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)' == ''">$(RepoRoot)Binaries\Obj\</BaseIntermediateOutputPath>
     <IntermediateOutputPath>$(BaseIntermediateOutputPath)$(Configuration)\$(MSBuildProjectName)\</IntermediateOutputPath>
 
-    <NetStandard20LibraryVersion>2.0.0-beta-25123-01</NetStandard20LibraryVersion>
-    <NetStandard20RefPath>$(NuGetPackageRoot)/NETStandard.Library/$(NetStandard20LibraryVersion)/build/netstandard2.0/ref/</NetStandard20RefPath>
-
-    <MicrosoftCSharpVersion>4.3.0</MicrosoftCSharpVersion>
+    <NetStandard20RefPath>$(NuGetPackageRoot)/NETStandard.Library/$(NETStandardLibraryVersion)/build/netstandard2.0/ref/</NetStandard20RefPath>
     <MicrosoftCSharpRefPath>$(NuGetPackageRoot)/Microsoft.CSharp/$(MicrosoftCSharpVersion)/ref/netstandard1.0/</MicrosoftCSharpRefPath>
 
     <!-- Workaround until we move to Microsoft.Net.Compilers.nupkg with this fix: https://github.com/dotnet/roslyn/commit/05c12ebfcdd08a02dbceded5327a8da7a7df23be:

build/config/RepoUtilData.json

@@ -48,7 +48,8 @@
         "^Microsoft.?Build.*",
         "GitLink",
         "Microsoft.NETCore.Runtime.CoreCLR",
-        "Microsoft.VSSDK.BuildTools"
+        "Microsoft.VSSDK.BuildTools",
+        "NETStandard.Library"
       ]
     }
   },
@@ -60,5 +61,10 @@
     "^src\\\\Dependencies.*",
     ".*NuSpec.loc.*",
     ".*Templates.*"
+  ],
+
+  "projectJsonExcludes": [
+    "^build\\\\MSBuildToolset.*",
+    "^src\\\\Tools\\\\Source\\\\CompilerGeneratorTools.*"
   ]
 }

src/Tools/RepoUtil/RepoData.cs

@@ -83,12 +83,13 @@ internal static RepoData Create(RepoConfig config, string sourcesDir, out List<N
             var floatingPackageMap = new Dictionary<string, NuGetPackageSource>(Constants.NugetPackageNameComparer);
             foreach (var filePath in ProjectJsonUtil.GetProjectJsonFiles(sourcesDir))
             {
-                if (config.ProjectJsonExcludes.Any(x => x.IsMatch(filePath)))
+                var fileName = FileName.FromFullPath(sourcesDir, filePath);
+
+                if (config.ProjectJsonExcludes.Any(x => x.IsMatch(fileName.RelativePath)))
                 {
                     continue;
                 }
 
-                var fileName = FileName.FromFullPath(sourcesDir, filePath);
                 foreach (var package in ProjectJsonUtil.GetDependencies(filePath))
                 {
                     if (fixedPackageSet.Contains(package))