Update VS configurations and ProjectGUID's for 4 new ref projects.

Commit migrated from dotnet/corefx@40954b6

src/libraries/System.Collections.Immutable/System.Collections.Immutable.sln

@@ -8,11 +8,18 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "System.Collections.Immutabl
 	EndProjectSection
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "System.Collections.Immutable", "src\System.Collections.Immutable.csproj", "{1DD0FF15-6234-4BD6-850A-317F05479554}"
+	ProjectSection(ProjectDependencies) = postProject
+		{C7EFF4EE-70DC-453B-B817-4AF67921AB03} = {C7EFF4EE-70DC-453B-B817-4AF67921AB03}
+	EndProjectSection
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "System.Collections.Immutable", "ref\System.Collections.Immutable.csproj", "{C7EFF4EE-70DC-453B-B817-4AF67921AB03}"
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "tests", "tests", "{1A2F9F4A-A032-433E-B914-ADD5992BB178}"
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "src", "src", "{E107E9C1-E893-4E87-987E-04EF0DCEAEFD}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "ref", "ref", "{2E666815-2EDB-464B-9DF6-380BF4789AD4}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -27,12 +34,17 @@ Global
 		{1DD0FF15-6234-4BD6-850A-317F05479554}.Debug|Any CPU.Build.0 = netcoreapp-Debug|Any CPU
 		{1DD0FF15-6234-4BD6-850A-317F05479554}.Release|Any CPU.ActiveCfg = netcoreapp-Release|Any CPU
 		{1DD0FF15-6234-4BD6-850A-317F05479554}.Release|Any CPU.Build.0 = netcoreapp-Release|Any CPU
+		{C7EFF4EE-70DC-453B-B817-4AF67921AB03}.Debug|Any CPU.ActiveCfg = netcoreapp-Debug|Any CPU
+		{C7EFF4EE-70DC-453B-B817-4AF67921AB03}.Debug|Any CPU.Build.0 = netcoreapp-Debug|Any CPU
+		{C7EFF4EE-70DC-453B-B817-4AF67921AB03}.Release|Any CPU.ActiveCfg = netcoreapp-Release|Any CPU
+		{C7EFF4EE-70DC-453B-B817-4AF67921AB03}.Release|Any CPU.Build.0 = netcoreapp-Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
 	EndGlobalSection
 	GlobalSection(NestedProjects) = preSolution
 		{95DFC527-4DC1-495E-97D7-E94EE1F7140D} = {1A2F9F4A-A032-433E-B914-ADD5992BB178}
 		{1DD0FF15-6234-4BD6-850A-317F05479554} = {E107E9C1-E893-4E87-987E-04EF0DCEAEFD}
+		{C7EFF4EE-70DC-453B-B817-4AF67921AB03} = {2E666815-2EDB-464B-9DF6-380BF4789AD4}
 	EndGlobalSection
 EndGlobal

src/libraries/System.Collections.Immutable/ref/System.Collections.Immutable.csproj

@@ -1,6 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.props))\dir.props" />
+  <PropertyGroup>
+    <ProjectGuid>{C7EFF4EE-70DC-453B-B817-4AF67921AB03}</ProjectGuid>
+  </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'netcoreapp-Debug|AnyCPU'" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'netcoreapp-Release|AnyCPU'" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'netstandard-Debug|AnyCPU'" />

src/libraries/System.Reflection.Metadata/System.Reflection.Metadata.sln

@@ -8,11 +8,18 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "System.Reflection.Metadata.
 	EndProjectSection
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "System.Reflection.Metadata", "src\System.Reflection.Metadata.csproj", "{F3E433C8-352F-4944-BF7F-765CE435370D}"
+	ProjectSection(ProjectDependencies) = postProject
+		{69B25962-B4C2-4295-8809-5653CD03FC75} = {69B25962-B4C2-4295-8809-5653CD03FC75}
+	EndProjectSection
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "System.Reflection.Metadata", "ref\System.Reflection.Metadata.csproj", "{69B25962-B4C2-4295-8809-5653CD03FC75}"
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "tests", "tests", "{1A2F9F4A-A032-433E-B914-ADD5992BB178}"
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "src", "src", "{E107E9C1-E893-4E87-987E-04EF0DCEAEFD}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "ref", "ref", "{2E666815-2EDB-464B-9DF6-380BF4789AD4}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -27,12 +34,17 @@ Global
 		{F3E433C8-352F-4944-BF7F-765CE435370D}.Debug|Any CPU.Build.0 = netcoreapp-Debug|Any CPU
 		{F3E433C8-352F-4944-BF7F-765CE435370D}.Release|Any CPU.ActiveCfg = netcoreapp-Release|Any CPU
 		{F3E433C8-352F-4944-BF7F-765CE435370D}.Release|Any CPU.Build.0 = netcoreapp-Release|Any CPU
+		{69B25962-B4C2-4295-8809-5653CD03FC75}.Debug|Any CPU.ActiveCfg = netcoreapp-Debug|Any CPU
+		{69B25962-B4C2-4295-8809-5653CD03FC75}.Debug|Any CPU.Build.0 = netcoreapp-Debug|Any CPU
+		{69B25962-B4C2-4295-8809-5653CD03FC75}.Release|Any CPU.ActiveCfg = netcoreapp-Release|Any CPU
+		{69B25962-B4C2-4295-8809-5653CD03FC75}.Release|Any CPU.Build.0 = netcoreapp-Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
 	EndGlobalSection
 	GlobalSection(NestedProjects) = preSolution
 		{7061832A-E8CF-4AB6-A8DC-44D2F5A43A13} = {1A2F9F4A-A032-433E-B914-ADD5992BB178}
 		{F3E433C8-352F-4944-BF7F-765CE435370D} = {E107E9C1-E893-4E87-987E-04EF0DCEAEFD}
+		{69B25962-B4C2-4295-8809-5653CD03FC75} = {2E666815-2EDB-464B-9DF6-380BF4789AD4}
 	EndGlobalSection
 EndGlobal

src/libraries/System.Reflection.Metadata/ref/System.Reflection.Metadata.csproj

@@ -2,6 +2,7 @@
 <Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.props))\dir.props" />
   <PropertyGroup>
+    <ProjectGuid>{69B25962-B4C2-4295-8809-5653CD03FC75}</ProjectGuid>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <CLSCompliant>false</CLSCompliant>
   </PropertyGroup>

src/libraries/System.Threading.Tasks.Dataflow/System.Threading.Tasks.Dataflow.sln

@@ -8,11 +8,18 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "System.Threading.Tasks.Data
 	EndProjectSection
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "System.Threading.Tasks.Dataflow", "src\System.Threading.Tasks.Dataflow.csproj", "{2E2F7224-7C72-4A81-9625-A5241F8D836D}"
+	ProjectSection(ProjectDependencies) = postProject
+		{01F36E3F-7664-4A71-AE6E-B8B6BF724FD1} = {01F36E3F-7664-4A71-AE6E-B8B6BF724FD1}
+	EndProjectSection
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "System.Threading.Tasks.Dataflow", "ref\System.Threading.Tasks.Dataflow.csproj", "{01F36E3F-7664-4A71-AE6E-B8B6BF724FD1}"
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "tests", "tests", "{1A2F9F4A-A032-433E-B914-ADD5992BB178}"
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "src", "src", "{E107E9C1-E893-4E87-987E-04EF0DCEAEFD}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "ref", "ref", "{2E666815-2EDB-464B-9DF6-380BF4789AD4}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -27,12 +34,17 @@ Global
 		{2E2F7224-7C72-4A81-9625-A5241F8D836D}.Debug|Any CPU.Build.0 = netstandard-Debug|Any CPU
 		{2E2F7224-7C72-4A81-9625-A5241F8D836D}.Release|Any CPU.ActiveCfg = netstandard-Release|Any CPU
 		{2E2F7224-7C72-4A81-9625-A5241F8D836D}.Release|Any CPU.Build.0 = netstandard-Release|Any CPU
+		{01F36E3F-7664-4A71-AE6E-B8B6BF724FD1}.Debug|Any CPU.ActiveCfg = netstandard-Debug|Any CPU
+		{01F36E3F-7664-4A71-AE6E-B8B6BF724FD1}.Debug|Any CPU.Build.0 = netstandard-Debug|Any CPU
+		{01F36E3F-7664-4A71-AE6E-B8B6BF724FD1}.Release|Any CPU.ActiveCfg = netstandard-Release|Any CPU
+		{01F36E3F-7664-4A71-AE6E-B8B6BF724FD1}.Release|Any CPU.Build.0 = netstandard-Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
 	EndGlobalSection
 	GlobalSection(NestedProjects) = preSolution
 		{72E21903-0FBA-444E-9855-3B4F05DFC1F9} = {1A2F9F4A-A032-433E-B914-ADD5992BB178}
 		{2E2F7224-7C72-4A81-9625-A5241F8D836D} = {E107E9C1-E893-4E87-987E-04EF0DCEAEFD}
+		{01F36E3F-7664-4A71-AE6E-B8B6BF724FD1} = {2E666815-2EDB-464B-9DF6-380BF4789AD4}
 	EndGlobalSection
 EndGlobal

src/libraries/System.Threading.Tasks.Dataflow/ref/System.Threading.Tasks.Dataflow.csproj

@@ -1,6 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.props))\dir.props" />
+  <PropertyGroup>
+    <ProjectGuid>{01F36E3F-7664-4A71-AE6E-B8B6BF724FD1}</ProjectGuid>
+  </PropertyGroup>
   <!-- Default configurations to help VS understand the configurations -->
   <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'netstandard-Debug|AnyCPU'" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'netstandard-Release|AnyCPU'" />

src/libraries/System.Threading.Tasks.Extensions/System.Threading.Tasks.Extensions.sln

@@ -8,11 +8,18 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "System.Threading.Tasks.Exte
 	EndProjectSection
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "System.Threading.Tasks.Extensions", "src\System.Threading.Tasks.Extensions.csproj", "{DE90AD0B-649D-4062-B8D9-9658DE140532}"
+	ProjectSection(ProjectDependencies) = postProject
+		{0DF7FA9A-E7D3-4CEF-862B-A37F5BBBB54C} = {0DF7FA9A-E7D3-4CEF-862B-A37F5BBBB54C}
+	EndProjectSection
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "System.Threading.Tasks.Extensions", "ref\System.Threading.Tasks.Extensions.csproj", "{0DF7FA9A-E7D3-4CEF-862B-A37F5BBBB54C}"
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "tests", "tests", "{1A2F9F4A-A032-433E-B914-ADD5992BB178}"
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "src", "src", "{E107E9C1-E893-4E87-987E-04EF0DCEAEFD}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "ref", "ref", "{2E666815-2EDB-464B-9DF6-380BF4789AD4}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -27,12 +34,17 @@ Global
 		{DE90AD0B-649D-4062-B8D9-9658DE140532}.Debug|Any CPU.Build.0 = netcoreapp-Debug|Any CPU
 		{DE90AD0B-649D-4062-B8D9-9658DE140532}.Release|Any CPU.ActiveCfg = netcoreapp-Release|Any CPU
 		{DE90AD0B-649D-4062-B8D9-9658DE140532}.Release|Any CPU.Build.0 = netcoreapp-Release|Any CPU
+		{0DF7FA9A-E7D3-4CEF-862B-A37F5BBBB54C}.Debug|Any CPU.ActiveCfg = netcoreapp-Debug|Any CPU
+		{0DF7FA9A-E7D3-4CEF-862B-A37F5BBBB54C}.Debug|Any CPU.Build.0 = netcoreapp-Debug|Any CPU
+		{0DF7FA9A-E7D3-4CEF-862B-A37F5BBBB54C}.Release|Any CPU.ActiveCfg = netcoreapp-Release|Any CPU
+		{0DF7FA9A-E7D3-4CEF-862B-A37F5BBBB54C}.Release|Any CPU.Build.0 = netcoreapp-Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
 	EndGlobalSection
 	GlobalSection(NestedProjects) = preSolution
 		{275B161B-D525-48A0-B1DE-344273AB9A99} = {1A2F9F4A-A032-433E-B914-ADD5992BB178}
 		{DE90AD0B-649D-4062-B8D9-9658DE140532} = {E107E9C1-E893-4E87-987E-04EF0DCEAEFD}
+		{0DF7FA9A-E7D3-4CEF-862B-A37F5BBBB54C} = {2E666815-2EDB-464B-9DF6-380BF4789AD4}
 	EndGlobalSection
 EndGlobal

src/libraries/System.Threading.Tasks.Extensions/ref/System.Threading.Tasks.Extensions.csproj

@@ -1,6 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.props))\dir.props" />
+  <PropertyGroup>
+    <ProjectGuid>{0DF7FA9A-E7D3-4CEF-862B-A37F5BBBB54C}</ProjectGuid>
+  </PropertyGroup>
   <!-- Default configurations to help VS understand the configurations -->
   <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'netcoreapp-Debug|AnyCPU'" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'netcoreapp-Release|AnyCPU'" />