Unify NuGet dependencies across the tree

To prevent projects across the tree from having different dependencies, we unify external package dependencies by creating empty C# projects that represent them. We then make use of project.json package inheritance (where a project inherits all packages dependencies from their dependencies) to unify it across the tree. No projects outside of this tree, should be directly referencing versions of these dependencies manually. For this check-in I've tackled Metadata, Reflection, and DiaSymReader. Will tackle the rest in future commits.

Unify NuGet dependencies across the tree
To prevent projects across the tree from having different dependencies, we unify external package dependencies by creating empty C# projects that represent them. We then make use of project.json package inheritance (where a project inherits all packages dependencies from their dependencies) to unify it across the tree. No projects outside of this tree, should be directly referencing versions of these dependencies manually. For this check-in I've tackled Metadata, Reflection, and DiaSymReader. Will tackle the rest in future commits.
4aef0b06 · David Kean · bddb4827 · 4aef0b06 · 4aef0b06 · 4aef0b06
84 changed file
--- a/Roslyn.sln
+++ b/Roslyn.sln
@@ -334,6 +334,17 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DeployCompilerGeneratorTool
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CommonCoreClrRuntime", "src\Tools\CommonCoreClrRuntime\CommonCoreClrRuntime.csproj", "{1B665337-9D6A-451A-AEAC-F7BF1AF95FFB}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Dependencies", "Dependencies", "{C2D1346B-9665-4150-B644-075CF1636BAA}"
+	ProjectSection(SolutionItems) = preProject
+		src\Dependencies\ReadMe.txt = src\Dependencies\ReadMe.txt
+	EndProjectSection
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DiaSymReader", "src\Dependencies\DiaSymReader\DiaSymReader.csproj", "{D2B8B03E-A85D-48A2-818F-9177D89586A9}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Immutable", "src\Dependencies\Immutable\Immutable.csproj", "{DCDA908D-EF5E-494B-ADDC-C26F5FD610CA}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Metadata", "src\Dependencies\Metadata\Metadata.csproj", "{E6796B97-D5C6-45B2-AE46-351D15DCFC71}"
+EndProject
 Global
 	GlobalSection(SharedMSBuildProjectFiles) = preSolution
 		src\Test\Utilities\Shared\TestUtilities.projitems*{76c6f005-c89d-4348-bb4a-391898dbeb52}*SharedItemsImports = 4
@@ -366,18 +377,18 @@ Global
 		src\ExpressionEvaluator\CSharp\Source\ResultProvider\CSharpResultProvider.projitems*{bf9dac1e-3a5e-4dc3-bb44-9a64e0d4e9d3}*SharedItemsImports = 4
 		src\Compilers\Core\SharedCollections\SharedCollections.projitems*{afde6bea-5038-4a4a-a88e-dbd2e4088eed}*SharedItemsImports = 4
 		src\ExpressionEvaluator\Core\Source\ResultProvider\ResultProvider.projitems*{fa0e905d-ec46-466d-b7b2-3b5557f9428c}*SharedItemsImports = 4
-		src\Compilers\Core\SharedCollections\SharedCollections.projitems*{1ee8cad3-55f9-4d91-96b2-084641da9a6c}*SharedItemsImports = 4
 		src\Compilers\Core\AnalyzerDriver\AnalyzerDriver.projitems*{1ee8cad3-55f9-4d91-96b2-084641da9a6c}*SharedItemsImports = 4
-		src\Compilers\Core\MSBuildTask\Shared\MSBuildTask.Shared.projitems*{7ad4fe65-9a30-41a6-8004-aa8f89bcb7f3}*SharedItemsImports = 4
+		src\Compilers\Core\SharedCollections\SharedCollections.projitems*{1ee8cad3-55f9-4d91-96b2-084641da9a6c}*SharedItemsImports = 4
 		src\Compilers\Core\CommandLine\CommandLine.projitems*{7ad4fe65-9a30-41a6-8004-aa8f89bcb7f3}*SharedItemsImports = 4
+		src\Compilers\Core\MSBuildTask\Shared\MSBuildTask.Shared.projitems*{7ad4fe65-9a30-41a6-8004-aa8f89bcb7f3}*SharedItemsImports = 4
 		src\Compilers\CSharp\CSharpAnalyzerDriver\CSharpAnalyzerDriver.projitems*{3973b09a-4fbf-44a5-8359-3d22ceb71f71}*SharedItemsImports = 4
 		src\ExpressionEvaluator\Core\Source\ResultProvider\ResultProvider.projitems*{bedc5a4a-809e-4017-9cfd-6c8d4e1847f0}*SharedItemsImports = 4
 		src\Compilers\CSharp\CSharpAnalyzerDriver\CSharpAnalyzerDriver.projitems*{b501a547-c911-4a05-ac6e-274a50dff30e}*SharedItemsImports = 4
 		src\Compilers\VisualBasic\BasicAnalyzerDriver\BasicAnalyzerDriver.projitems*{2523d0e6-df32-4a3e-8ae0-a19bffae2ef6}*SharedItemsImports = 4
 		src\Compilers\Core\CommandLine\CommandLine.projitems*{4b45ca0c-03a0-400f-b454-3d4bcb16af38}*SharedItemsImports = 4
 		src\Compilers\Core\SharedCollections\SharedCollections.projitems*{c1930979-c824-496b-a630-70f5369a636f}*SharedItemsImports = 13
-		src\Compilers\Core\MSBuildTask\Shared\MSBuildTask.Shared.projitems*{d874349c-8bb3-4bdc-8535-2d52ccca1198}*SharedItemsImports = 4
 		src\Compilers\Core\CommandLine\CommandLine.projitems*{d874349c-8bb3-4bdc-8535-2d52ccca1198}*SharedItemsImports = 4
+		src\Compilers\Core\MSBuildTask\Shared\MSBuildTask.Shared.projitems*{d874349c-8bb3-4bdc-8535-2d52ccca1198}*SharedItemsImports = 4
 		src\Compilers\Core\CommandLine\CommandLine.projitems*{e3cd2895-76a8-4d11-a316-ea67cb5ea42c}*SharedItemsImports = 4
 	EndGlobalSection
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -2861,6 +2872,66 @@ Global
 		{1B665337-9D6A-451A-AEAC-F7BF1AF95FFB}.Release|x64.ActiveCfg = Release|x64
 		{1B665337-9D6A-451A-AEAC-F7BF1AF95FFB}.Release|x64.Build.0 = Release|x64
 		{1B665337-9D6A-451A-AEAC-F7BF1AF95FFB}.Release|x86.ActiveCfg = Release|x64
+		{D2B8B03E-A85D-48A2-818F-9177D89586A9}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{D2B8B03E-A85D-48A2-818F-9177D89586A9}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{D2B8B03E-A85D-48A2-818F-9177D89586A9}.Debug|ARM.ActiveCfg = Debug|Any CPU
+		{D2B8B03E-A85D-48A2-818F-9177D89586A9}.Debug|ARM.Build.0 = Debug|Any CPU
+		{D2B8B03E-A85D-48A2-818F-9177D89586A9}.Debug|Mixed Platforms.ActiveCfg = Debug|Any CPU
+		{D2B8B03E-A85D-48A2-818F-9177D89586A9}.Debug|Mixed Platforms.Build.0 = Debug|Any CPU
+		{D2B8B03E-A85D-48A2-818F-9177D89586A9}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{D2B8B03E-A85D-48A2-818F-9177D89586A9}.Debug|x64.Build.0 = Debug|Any CPU
+		{D2B8B03E-A85D-48A2-818F-9177D89586A9}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{D2B8B03E-A85D-48A2-818F-9177D89586A9}.Debug|x86.Build.0 = Debug|Any CPU
+		{D2B8B03E-A85D-48A2-818F-9177D89586A9}.Release|Any CPU.ActiveCfg = Debug|Any CPU
+		{D2B8B03E-A85D-48A2-818F-9177D89586A9}.Release|Any CPU.Build.0 = Debug|Any CPU
+		{D2B8B03E-A85D-48A2-818F-9177D89586A9}.Release|ARM.ActiveCfg = Debug|Any CPU
+		{D2B8B03E-A85D-48A2-818F-9177D89586A9}.Release|ARM.Build.0 = Debug|Any CPU
+		{D2B8B03E-A85D-48A2-818F-9177D89586A9}.Release|Mixed Platforms.ActiveCfg = Debug|Any CPU
+		{D2B8B03E-A85D-48A2-818F-9177D89586A9}.Release|Mixed Platforms.Build.0 = Debug|Any CPU
+		{D2B8B03E-A85D-48A2-818F-9177D89586A9}.Release|x64.ActiveCfg = Debug|Any CPU
+		{D2B8B03E-A85D-48A2-818F-9177D89586A9}.Release|x64.Build.0 = Debug|Any CPU
+		{D2B8B03E-A85D-48A2-818F-9177D89586A9}.Release|x86.ActiveCfg = Debug|Any CPU
+		{D2B8B03E-A85D-48A2-818F-9177D89586A9}.Release|x86.Build.0 = Debug|Any CPU
+		{DCDA908D-EF5E-494B-ADDC-C26F5FD610CA}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{DCDA908D-EF5E-494B-ADDC-C26F5FD610CA}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{DCDA908D-EF5E-494B-ADDC-C26F5FD610CA}.Debug|ARM.ActiveCfg = Debug|Any CPU
+		{DCDA908D-EF5E-494B-ADDC-C26F5FD610CA}.Debug|ARM.Build.0 = Debug|Any CPU
+		{DCDA908D-EF5E-494B-ADDC-C26F5FD610CA}.Debug|Mixed Platforms.ActiveCfg = Debug|Any CPU
+		{DCDA908D-EF5E-494B-ADDC-C26F5FD610CA}.Debug|Mixed Platforms.Build.0 = Debug|Any CPU
+		{DCDA908D-EF5E-494B-ADDC-C26F5FD610CA}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{DCDA908D-EF5E-494B-ADDC-C26F5FD610CA}.Debug|x64.Build.0 = Debug|Any CPU
+		{DCDA908D-EF5E-494B-ADDC-C26F5FD610CA}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{DCDA908D-EF5E-494B-ADDC-C26F5FD610CA}.Debug|x86.Build.0 = Debug|Any CPU
+		{DCDA908D-EF5E-494B-ADDC-C26F5FD610CA}.Release|Any CPU.ActiveCfg = Debug|Any CPU
+		{DCDA908D-EF5E-494B-ADDC-C26F5FD610CA}.Release|Any CPU.Build.0 = Debug|Any CPU
+		{DCDA908D-EF5E-494B-ADDC-C26F5FD610CA}.Release|ARM.ActiveCfg = Debug|Any CPU
+		{DCDA908D-EF5E-494B-ADDC-C26F5FD610CA}.Release|ARM.Build.0 = Debug|Any CPU
+		{DCDA908D-EF5E-494B-ADDC-C26F5FD610CA}.Release|Mixed Platforms.ActiveCfg = Debug|Any CPU
+		{DCDA908D-EF5E-494B-ADDC-C26F5FD610CA}.Release|Mixed Platforms.Build.0 = Debug|Any CPU
+		{DCDA908D-EF5E-494B-ADDC-C26F5FD610CA}.Release|x64.ActiveCfg = Debug|Any CPU
+		{DCDA908D-EF5E-494B-ADDC-C26F5FD610CA}.Release|x64.Build.0 = Debug|Any CPU
+		{DCDA908D-EF5E-494B-ADDC-C26F5FD610CA}.Release|x86.ActiveCfg = Debug|Any CPU
+		{DCDA908D-EF5E-494B-ADDC-C26F5FD610CA}.Release|x86.Build.0 = Debug|Any CPU
+		{E6796B97-D5C6-45B2-AE46-351D15DCFC71}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{E6796B97-D5C6-45B2-AE46-351D15DCFC71}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{E6796B97-D5C6-45B2-AE46-351D15DCFC71}.Debug|ARM.ActiveCfg = Debug|Any CPU
+		{E6796B97-D5C6-45B2-AE46-351D15DCFC71}.Debug|ARM.Build.0 = Debug|Any CPU
+		{E6796B97-D5C6-45B2-AE46-351D15DCFC71}.Debug|Mixed Platforms.ActiveCfg = Debug|Any CPU
+		{E6796B97-D5C6-45B2-AE46-351D15DCFC71}.Debug|Mixed Platforms.Build.0 = Debug|Any CPU
+		{E6796B97-D5C6-45B2-AE46-351D15DCFC71}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{E6796B97-D5C6-45B2-AE46-351D15DCFC71}.Debug|x64.Build.0 = Debug|Any CPU
+		{E6796B97-D5C6-45B2-AE46-351D15DCFC71}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{E6796B97-D5C6-45B2-AE46-351D15DCFC71}.Debug|x86.Build.0 = Debug|Any CPU
+		{E6796B97-D5C6-45B2-AE46-351D15DCFC71}.Release|Any CPU.ActiveCfg = Debug|Any CPU
+		{E6796B97-D5C6-45B2-AE46-351D15DCFC71}.Release|Any CPU.Build.0 = Debug|Any CPU
+		{E6796B97-D5C6-45B2-AE46-351D15DCFC71}.Release|ARM.ActiveCfg = Debug|Any CPU
+		{E6796B97-D5C6-45B2-AE46-351D15DCFC71}.Release|ARM.Build.0 = Debug|Any CPU
+		{E6796B97-D5C6-45B2-AE46-351D15DCFC71}.Release|Mixed Platforms.ActiveCfg = Debug|Any CPU
+		{E6796B97-D5C6-45B2-AE46-351D15DCFC71}.Release|Mixed Platforms.Build.0 = Debug|Any CPU
+		{E6796B97-D5C6-45B2-AE46-351D15DCFC71}.Release|x64.ActiveCfg = Debug|Any CPU
+		{E6796B97-D5C6-45B2-AE46-351D15DCFC71}.Release|x64.Build.0 = Debug|Any CPU
+		{E6796B97-D5C6-45B2-AE46-351D15DCFC71}.Release|x86.ActiveCfg = Debug|Any CPU
+		{E6796B97-D5C6-45B2-AE46-351D15DCFC71}.Release|x86.Build.0 = Debug|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -3016,5 +3087,8 @@ Global
 		{1553DE60-A2B0-4FAF-B1B8-C0A7313781CC} = {FD0FAF5F-1DED-485C-99FA-84B97F3A8EEC}
 		{6DA08F12-32F2-4DD9-BBAD-982EB71A2C9B} = {FD0FAF5F-1DED-485C-99FA-84B97F3A8EEC}
 		{1B665337-9D6A-451A-AEAC-F7BF1AF95FFB} = {FD0FAF5F-1DED-485C-99FA-84B97F3A8EEC}
+		{D2B8B03E-A85D-48A2-818F-9177D89586A9} = {C2D1346B-9665-4150-B644-075CF1636BAA}
+		{DCDA908D-EF5E-494B-ADDC-C26F5FD610CA} = {C2D1346B-9665-4150-B644-075CF1636BAA}
+		{E6796B97-D5C6-45B2-AE46-351D15DCFC71} = {C2D1346B-9665-4150-B644-075CF1636BAA}
 	EndGlobalSection
 EndGlobal
--- a/build/Targets/ProducesNoOutput.Imports.targets
+++ b/build/Targets/ProducesNoOutput.Imports.targets
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\Portable\$(TargetFrameworkVersion)\Microsoft.Portable.CSharp.targets" />
+  <PropertyGroup>
+    <TargetPath></TargetPath>    <!-- Prevent projects referencing this from trying to pass us to the compiler -->
+  </PropertyGroup>
+  <Target Name="CoreCompile" />                               <!-- Prevent Csc from being called -->  
+  <Target Name="CopyFilesToOutputDirectory" />                <!-- Prevent non-existent output from being copied -->
+  <Target Name="GenerateTargetFrameworkMonikerAttribute" />   <!-- Don't generate TFM attribute -->  
+  <Target Name="RuntimeImplementationProjectOutputGroup" />   <!-- Group always attempts resolve runtime, regardless of <CopyNuGetImplementations>-->
+</Project>
\ No newline at end of file
--- a/build/Targets/ProducesNoOutput.Settings.targets
+++ b/build/Targets/ProducesNoOutput.Settings.targets
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <CopyNuGetImplementations>false</CopyNuGetImplementations>
+    <UseCommonOutputDirectory>true</UseCommonOutputDirectory>
+    <OutputPath>bin</OutputPath>
+    <OutputType>Library</OutputType>
+    <TargetFrameworkIdentifier>.NETPortable</TargetFrameworkIdentifier>
+    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
+    <TargetFrameworkProfile>Profile7</TargetFrameworkProfile>
+  </PropertyGroup> 
+</Project>
\ No newline at end of file
--- a/src/Compilers/CSharp/Test/Emit/CSharpCompilerEmitTest.csproj
+++ b/src/Compilers/CSharp/Test/Emit/CSharpCompilerEmitTest.csproj
@@ -16,6 +16,10 @@
    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
  </PropertyGroup>
  <ItemGroup Label="Project References">
+    <ProjectReference Include="..\..\..\..\Dependencies\DiaSymReader\DiaSymReader.csproj">
+      <Project>{27b7a354-80cc-4bac-abf5-d4081056cea9}</Project>
+      <Name>DiaSymReader</Name>
+    </ProjectReference>
    <ProjectReference Include="..\..\..\..\Test\PdbUtilities\PdbUtilities.csproj">
      <Project>{AFDE6BEA-5038-4A4A-A88E-DBD2E4088EED}</Project>
      <Name>PdbUtilities</Name>

--- a/src/Compilers/CSharp/Test/Emit/project.json
+++ b/src/Compilers/CSharp/Test/Emit/project.json
 {
  "dependencies": {
-    "Microsoft.DiaSymReader": "1.0.7",
    "xunit": "2.1.0",
    "xunit.runner.console": "2.1.0"
  },

--- a/src/Compilers/Core/MSBuildTaskTests/project.json
+++ b/src/Compilers/Core/MSBuildTaskTests/project.json
 {
  "dependencies": {
-    "Microsoft.DiaSymReader": "1.0.7",
    "Moq": "4.2.1402.2112",
    "xunit": "2.1.0",
    "xunit.runner.console": "2.1.0"

--- a/src/Compilers/Core/Portable/CodeAnalysis.csproj
+++ b/src/Compilers/Core/Portable/CodeAnalysis.csproj
@@ -785,6 +785,16 @@
    <PublicAPI Include="PublicAPI.Shipped.txt" />
    <PublicAPI Include="PublicAPI.Unshipped.txt" />
  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\..\..\Dependencies\Immutable\Immutable.csproj">
+      <Project>{030f8ab1-d06d-4526-adec-8e6010899c71}</Project>
+      <Name>Immutable</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\..\..\Dependencies\Metadata\Metadata.csproj">
+      <Project>{b36c94c7-f34c-43bc-8834-0b9eea6dd4df}</Project>
+      <Name>Metadata</Name>
+    </ProjectReference>
+  </ItemGroup>
  <Import Project="..\AnalyzerDriver\AnalyzerDriver.projitems" Label="Shared" />
  <Import Project="..\SharedCollections\SharedCollections.projitems" Label="Shared" />
  <ImportGroup Label="Targets">

--- a/src/Compilers/Core/Portable/project.json
+++ b/src/Compilers/Core/Portable/project.json
 {
  "supports": {},
  "dependencies": {
-    "System.Collections.Immutable": "1.1.37",
-    "System.Reflection.Metadata": "1.2.0"
  },
  "frameworks": {
    ".NETPortable,Version=v4.5,Profile=Profile7": {}

--- a/src/Compilers/Server/VBCSCompiler/VBCSCompiler.csproj
+++ b/src/Compilers/Server/VBCSCompiler/VBCSCompiler.csproj
@@ -83,4 +83,4 @@
  <ImportGroup Label="Targets">
    <Import Project="..\..\..\..\build\Targets\VSL.Imports.targets" />
  </ImportGroup>
 </Project>
\ No newline at end of file
--- a/src/Compilers/Server/VBCSCompiler/project.json
+++ b/src/Compilers/Server/VBCSCompiler/project.json
 {
  "dependencies": { 
-    "System.Collections.Immutable": "1.1.37",
-    "System.Reflection.Metadata": "1.2.0",
  },
  "frameworks": {
    "net45": { }

--- a/src/Compilers/Server/VBCSCompilerTests/VBCSCompilerTests.csproj
+++ b/src/Compilers/Server/VBCSCompilerTests/VBCSCompilerTests.csproj
@@ -19,6 +19,10 @@
    <TargetFrameworkProfile />
  </PropertyGroup>
  <ItemGroup Label="Project References">
+    <ProjectReference Include="..\..\..\Dependencies\DiaSymReader\DiaSymReader.csproj">
+      <Project>{27b7a354-80cc-4bac-abf5-d4081056cea9}</Project>
+      <Name>DiaSymReader</Name>
+    </ProjectReference>
    <ProjectReference Include="..\..\CSharp\csc\csc.csproj">
      <Project>{4b45ca0c-03a0-400f-b454-3d4bcb16af38}</Project>
      <Name>csc</Name>
@@ -127,4 +131,4 @@
    <Import Project="..\..\..\..\build\Targets\VSL.Imports.targets" />
    <Import Project="..\..\..\..\build\Targets\Roslyn.Toolsets.Xunit.targets" />
  </ImportGroup>
 </Project>
\ No newline at end of file
--- a/src/Compilers/Server/VBCSCompilerTests/project.json
+++ b/src/Compilers/Server/VBCSCompilerTests/project.json
 {
  "dependencies": {
-    "Microsoft.DiaSymReader": "1.0.7",
    "Moq": "4.2.1402.2112",
    "xunit": "2.1.0",
    "xunit.runner.console": "2.1.0"

--- a/src/Compilers/VisualBasic/Test/Emit/BasicCompilerEmitTest.vbproj
+++ b/src/Compilers/VisualBasic/Test/Emit/BasicCompilerEmitTest.vbproj
@@ -14,6 +14,10 @@
    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
  </PropertyGroup>
  <ItemGroup Label="Project References">
+    <ProjectReference Include="..\..\..\..\Dependencies\DiaSymReader\DiaSymReader.csproj">
+      <Project>{27b7a354-80cc-4bac-abf5-d4081056cea9}</Project>
+      <Name>DiaSymReader</Name>
+    </ProjectReference>
    <ProjectReference Include="..\..\..\..\Test\PdbUtilities\PdbUtilities.csproj">
      <Project>{AFDE6BEA-5038-4A4A-A88E-DBD2E4088EED}</Project>
      <Name>PdbUtilities</Name>
@@ -260,4 +264,4 @@
    <Import Project="..\..\..\..\..\build\Targets\VSL.Imports.targets" />
    <Import Project="..\..\..\..\..\build\Targets\Roslyn.Toolsets.Xunit.targets" />
  </ImportGroup>
 </Project>
\ No newline at end of file
--- a/src/Compilers/VisualBasic/Test/Emit/project.json
+++ b/src/Compilers/VisualBasic/Test/Emit/project.json
 {
  "dependencies": {
-    "Microsoft.DiaSymReader": "1.0.7",
    "xunit": "2.1.0",
    "xunit.runner.console": "2.1.0"
  },

--- a/src/Debugging/Microsoft.DiaSymReader.PortablePdb/Microsoft.DiaSymReader.PortablePdb.csproj
+++ b/src/Debugging/Microsoft.DiaSymReader.PortablePdb/Microsoft.DiaSymReader.PortablePdb.csproj
@@ -94,6 +94,20 @@
  <ItemGroup>
    <InternalsVisibleToTest Include="Microsoft.DiaSymReader.PortablePdb.UnitTests" />
  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\..\Dependencies\DiaSymReader\DiaSymReader.csproj">
+      <Project>{27b7a354-80cc-4bac-abf5-d4081056cea9}</Project>
+      <Name>DiaSymReader</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\..\Dependencies\Immutable\Immutable.csproj">
+      <Project>{030f8ab1-d06d-4526-adec-8e6010899c71}</Project>
+      <Name>Immutable</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\..\Dependencies\Metadata\Metadata.csproj">
+      <Project>{b36c94c7-f34c-43bc-8834-0b9eea6dd4df}</Project>
+      <Name>Metadata</Name>
+    </ProjectReference>
+  </ItemGroup>
  <ImportGroup Label="Targets">
    <Import Project="..\..\..\build\Targets\VSL.Imports.targets" />
  </ImportGroup>

--- a/src/Debugging/Microsoft.DiaSymReader.PortablePdb/project.json
+++ b/src/Debugging/Microsoft.DiaSymReader.PortablePdb/project.json
 {
  "dependencies": {
-    "Microsoft.DiaSymReader": "1.0.7",
-    "System.Collections.Immutable": "1.1.37",
-    "System.Reflection.Metadata": "1.2.0"
  },
  "frameworks": {
    ".NETPortable,Version=v4.5,Profile=Profile7": {}

--- a/src/Dependencies/DiaSymReader/DiaSymReader.csproj
+++ b/src/Dependencies/DiaSymReader/DiaSymReader.csproj
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="..\..\..\build\Targets\ProducesNoOutput.Settings.targets" />
+  <PropertyGroup>
+    <ProjectGuid>D2B8B03E-A85D-48A2-818F-9177D89586A9</ProjectGuid>
+    <ProjectTypeGuids>{786C830F-07A1-408B-BD7F-6EE04809D6DB};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+  </PropertyGroup>
+  <ItemGroup>
+    <Content Include="project.json" />
+  </ItemGroup>
+  <Import Project="..\..\..\build\Targets\ProducesNoOutput.Imports.targets" />
+</Project>
\ No newline at end of file
--- a/src/Dependencies/DiaSymReader/project.json
+++ b/src/Dependencies/DiaSymReader/project.json
+{
+  "supports": {},
+  "dependencies": {
+    "Microsoft.DiaSymReader": "1.0.7"
+  },
+  "frameworks": {
+    ".NETPortable,Version=v4.5,Profile=Profile7": {}
+  }
+}
\ No newline at end of file
--- a/src/Dependencies/Immutable/Immutable.csproj
+++ b/src/Dependencies/Immutable/Immutable.csproj
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="..\..\..\build\Targets\ProducesNoOutput.Settings.targets" />
+  <PropertyGroup>
+    <ProjectGuid>DCDA908D-EF5E-494B-ADDC-C26F5FD610CA</ProjectGuid>
+    <ProjectTypeGuids>{786C830F-07A1-408B-BD7F-6EE04809D6DB};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+  </PropertyGroup>
+  <ItemGroup>
+    <Content Include="project.json" />
+  </ItemGroup>
+  <Import Project="..\..\..\build\Targets\ProducesNoOutput.Imports.targets" />
+</Project>
\ No newline at end of file
--- a/src/Dependencies/Immutable/project.json
+++ b/src/Dependencies/Immutable/project.json
+{
+  "supports": {},
+  "dependencies": {
+    "System.Collections.Immutable": "1.1.37"
+  },
+  "frameworks": {
+    ".NETPortable,Version=v4.5,Profile=Profile7": {}
+  }
+}
\ No newline at end of file
--- a/src/Dependencies/Metadata/Metadata.csproj
+++ b/src/Dependencies/Metadata/Metadata.csproj
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="..\..\..\build\Targets\ProducesNoOutput.Settings.targets" />
+  <PropertyGroup>
+    <ProjectGuid>E6796B97-D5C6-45B2-AE46-351D15DCFC71</ProjectGuid>
+    <ProjectTypeGuids>{786C830F-07A1-408B-BD7F-6EE04809D6DB};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+  </PropertyGroup>
+  <ItemGroup>
+    <Content Include="project.json" />
+  </ItemGroup>
+  <Import Project="..\..\..\build\Targets\ProducesNoOutput.Imports.targets" />
+</Project>
\ No newline at end of file
--- a/src/Dependencies/Metadata/project.json
+++ b/src/Dependencies/Metadata/project.json
+{
+  "supports": {},
+  "dependencies": {
+    "System.Reflection.Metadata": "1.2.0"
+  },
+  "frameworks": {
+    ".NETPortable,Version=v4.5,Profile=Profile7": {}
+  }
+}
\ No newline at end of file
--- a/src/Dependencies/ReadMe.txt
+++ b/src/Dependencies/ReadMe.txt
+To prevent projects across the tree from having different dependencies, we unify 
+external package dependencies by creating empty C# projects that represent them.
+We then make use of project.json package inheritance (where a project inherits
+all packages dependencies from their dependencies) to unify it across the tree.
+No projects outside of this tree should be directly referencing versions of 
+these dependencies manually.
\ No newline at end of file
--- a/src/EditorFeatures/Core/EditorFeatures.csproj
+++ b/src/EditorFeatures/Core/EditorFeatures.csproj
@@ -22,6 +22,10 @@
      <Project>{1EE8CAD3-55F9-4D91-96B2-084641DA9A6C}</Project>
      <Name>CodeAnalysis</Name>
    </ProjectReference>
+    <ProjectReference Include="..\..\Dependencies\Immutable\Immutable.csproj">
+      <Project>{030f8ab1-d06d-4526-adec-8e6010899c71}</Project>
+      <Name>Immutable</Name>
+    </ProjectReference>
    <ProjectReference Include="..\..\Workspaces\Core\Desktop\Workspaces.Desktop.csproj">
      <Project>{2e87fa96-50bb-4607-8676-46521599f998}</Project>
      <Name>Workspaces.Desktop</Name>

--- a/src/EditorFeatures/Core/project.json
+++ b/src/EditorFeatures/Core/project.json
 {
  "dependencies": {
-    "System.Collections.Immutable": "1.1.37"
  },
  "frameworks": {
    "net46": {}

--- a/src/ExpressionEvaluator/CSharp/Test/ExpressionCompiler/CSharpExpressionCompilerTest.csproj
+++ b/src/ExpressionEvaluator/CSharp/Test/ExpressionCompiler/CSharpExpressionCompilerTest.csproj
@@ -20,6 +20,10 @@
      <Project>{7a4b2176-7bfd-4b75-a61a-e25a1fdd0a1e}</Project>
      <Name>CSharpCompilerTestUtilities.Desktop</Name>
    </ProjectReference>
+    <ProjectReference Include="..\..\..\..\Dependencies\DiaSymReader\DiaSymReader.csproj">
+      <Project>{27b7a354-80cc-4bac-abf5-d4081056cea9}</Project>
+      <Name>DiaSymReader</Name>
+    </ProjectReference>
    <ProjectReference Include="..\..\..\..\Test\Utilities\Portable.FX45\TestUtilities.FX45.csproj">
      <Project>{f7712928-1175-47b3-8819-ee086753dee2}</Project>
      <Name>TestUtilities.FX45</Name>

--- a/src/ExpressionEvaluator/CSharp/Test/ExpressionCompiler/project.json
+++ b/src/ExpressionEvaluator/CSharp/Test/ExpressionCompiler/project.json
 {
  "dependencies": {
-    "Microsoft.DiaSymReader": "1.0.7",
    "xunit": "2.1.0",
    "xunit.runner.console": "2.1.0"
  },

--- a/src/ExpressionEvaluator/CSharp/Test/ResultProvider/project.json
+++ b/src/ExpressionEvaluator/CSharp/Test/ResultProvider/project.json
 {
  "dependencies": {
-    "System.Collections.Immutable": "1.1.37",
    "xunit": "2.1.0",
    "xunit.runner.console": "2.1.0"
  },

--- a/src/ExpressionEvaluator/Core/Source/ExpressionCompiler/ExpressionCompiler.csproj
+++ b/src/ExpressionEvaluator/Core/Source/ExpressionCompiler/ExpressionCompiler.csproj
@@ -70,6 +70,10 @@
    <Reference Include="$(OutDir)Microsoft.VisualStudio.Debugger.Engine.dll" />
  </ItemGroup>
  <ItemGroup Label="Project References">
+    <ProjectReference Include="..\..\..\..\Dependencies\DiaSymReader\DiaSymReader.csproj">
+      <Project>{27b7a354-80cc-4bac-abf5-d4081056cea9}</Project>
+      <Name>DiaSymReader</Name>
+    </ProjectReference>
    <ProjectReference Include="..\Concord\Concord.csproj">
      <Project>{5002636a-fe8d-40bf-8818-ab513a2194fa}</Project>
      <Name>Concord</Name>

--- a/src/ExpressionEvaluator/Core/Source/ExpressionCompiler/project.json
+++ b/src/ExpressionEvaluator/Core/Source/ExpressionCompiler/project.json
 {
  "dependencies": {
-    "Microsoft.DiaSymReader": "1.0.7"
  },
  "frameworks": {
    ".NETPortable,Version=v4.5,Profile=Profile7": {}

--- a/src/ExpressionEvaluator/Core/Test/ExpressionCompiler/ExpressionCompilerTestUtilities.csproj
+++ b/src/ExpressionEvaluator/Core/Test/ExpressionCompiler/ExpressionCompilerTestUtilities.csproj
@@ -22,6 +22,10 @@
    <Reference Include="$(OutDir)Microsoft.VisualStudio.Debugger.Engine.dll" />
  </ItemGroup>
  <ItemGroup Label="Project References">
+    <ProjectReference Include="..\..\..\..\Dependencies\DiaSymReader\DiaSymReader.csproj">
+      <Project>{27b7a354-80cc-4bac-abf5-d4081056cea9}</Project>
+      <Name>DiaSymReader</Name>
+    </ProjectReference>
    <ProjectReference Include="..\..\..\..\Test\Utilities\Portable.FX45\TestUtilities.FX45.csproj">
      <Project>{f7712928-1175-47b3-8819-ee086753dee2}</Project>
      <Name>TestUtilities.FX45</Name>

--- a/src/ExpressionEvaluator/Core/Test/ExpressionCompiler/project.json
+++ b/src/ExpressionEvaluator/Core/Test/ExpressionCompiler/project.json
 {
  "dependencies": {
-    "Microsoft.DiaSymReader": "1.0.7",
    "xunit": "2.1.0"
  },
  "frameworks": {

--- a/src/ExpressionEvaluator/Core/Test/ResultProvider/ResultProviderTestUtilities.csproj
+++ b/src/ExpressionEvaluator/Core/Test/ResultProvider/ResultProviderTestUtilities.csproj
@@ -22,6 +22,10 @@
    <Reference Include="Microsoft.CSharp" />
  </ItemGroup>
  <ItemGroup Label="Project References">
+    <ProjectReference Include="..\..\..\..\Dependencies\Immutable\Immutable.csproj">
+      <Project>{030f8ab1-d06d-4526-adec-8e6010899c71}</Project>
+      <Name>Immutable</Name>
+    </ProjectReference>
    <ProjectReference Include="..\..\..\..\Test\Utilities\Desktop\TestUtilities.Desktop.csproj">
      <Project>{76c6f005-c89d-4348-bb4a-391898dbeb52}</Project>
      <Name>TestUtilities.Desktop</Name>

--- a/src/ExpressionEvaluator/Core/Test/ResultProvider/project.json
+++ b/src/ExpressionEvaluator/Core/Test/ResultProvider/project.json
 {
  "dependencies": {
-    "System.Collections.Immutable": "1.1.37",
    "xunit": "2.1.0"
  },
  "frameworks": {

--- a/src/ExpressionEvaluator/VisualBasic/Test/ExpressionCompiler/BasicExpressionCompilerTest.vbproj
+++ b/src/ExpressionEvaluator/VisualBasic/Test/ExpressionCompiler/BasicExpressionCompilerTest.vbproj
@@ -17,6 +17,10 @@
    <Reference Include="System.Xml.Linq" />
  </ItemGroup>
  <ItemGroup Label="Project References">
+    <ProjectReference Include="..\..\..\..\Dependencies\DiaSymReader\DiaSymReader.csproj">
+      <Project>{27b7a354-80cc-4bac-abf5-d4081056cea9}</Project>
+      <Name>DiaSymReader</Name>
+    </ProjectReference>
    <ProjectReference Include="..\..\..\..\Test\Utilities\Portable.FX45\TestUtilities.FX45.csproj">
      <Project>{f7712928-1175-47b3-8819-ee086753dee2}</Project>
      <Name>TestUtilities.FX45</Name>

--- a/src/ExpressionEvaluator/VisualBasic/Test/ExpressionCompiler/project.json
+++ b/src/ExpressionEvaluator/VisualBasic/Test/ExpressionCompiler/project.json
 {
  "dependencies": {
-    "Microsoft.DiaSymReader": "1.0.7",
    "xunit": "2.1.0",
    "xunit.runner.console": "2.1.0"
  },

--- a/src/Samples/CSharp/APISampleUnitTests/project.json
+++ b/src/Samples/CSharp/APISampleUnitTests/project.json
 {
  "dependencies": {
-    "System.Collections.Immutable": "1.1.37",
-    "System.Reflection.Metadata": "1.2.0",
    "xunit": "2.1.0"
  },
  "frameworks": {

--- a/src/Samples/CSharp/Analyzers/CSharpAnalyzers/CSharpAnalyzers.Test/project.json
+++ b/src/Samples/CSharp/Analyzers/CSharpAnalyzers/CSharpAnalyzers.Test/project.json
 {
    "dependencies": {
-        "Microsoft.Composition": "1.0.27",
+        "Microsoft.Composition": "1.0.27"
-        "System.Collections.Immutable": "1.1.37",
-        "System.Reflection.Metadata": "1.2.0"
    },
    "frameworks": {
      "net452": {}

--- a/src/Samples/CSharp/Analyzers/CSharpAnalyzers/CSharpAnalyzers/project.json
+++ b/src/Samples/CSharp/Analyzers/CSharpAnalyzers/CSharpAnalyzers/project.json
 {
  "dependencies": {
-    "Microsoft.Composition": "1.0.27",
+    "Microsoft.Composition": "1.0.27"
-    "System.Collections.Immutable": "1.1.37",
-    "System.Reflection.Metadata": "1.2.0"
  },
  "frameworks": {
    ".NETPortable,Version=v4.5,Profile=Profile7": {}

--- a/src/Samples/CSharp/ConsoleClassifier/project.json
+++ b/src/Samples/CSharp/ConsoleClassifier/project.json
 {
  "dependencies": {
-    "System.Collections.Immutable": "1.1.37",
-    "System.Reflection.Metadata": "1.2.0",
    "Microsoft.Composition": "1.0.27"
  },
  "frameworks": {

--- a/src/Samples/CSharp/ConvertToAutoProperty/project.json
+++ b/src/Samples/CSharp/ConvertToAutoProperty/project.json
 {
  "dependencies": {
-    "Microsoft.Composition": "1.0.27",
+    "Microsoft.Composition": "1.0.27"
-    "System.Reflection.Metadata": "1.2.0",
-    "System.Collections.Immutable": "1.1.37"
  },
  "frameworks": {
    "net452": {}

--- a/src/Samples/CSharp/ConvertToConditional/Impl/project.json
+++ b/src/Samples/CSharp/ConvertToConditional/Impl/project.json
 {
  "dependencies": {
-    "Microsoft.Composition": "1.0.27",
+    "Microsoft.Composition": "1.0.27"
-    "System.Reflection.Metadata": "1.2.0",
-    "System.Collections.Immutable": "1.1.37"
  },
  "frameworks": {
    "net46": {}

--- a/src/Samples/CSharp/ConvertToConditional/Test/project.json
+++ b/src/Samples/CSharp/ConvertToConditional/Test/project.json
 {
  "dependencies": {
    "Microsoft.Composition": "1.0.27",
-    "System.Collections.Immutable": "1.1.37",
-    "System.Reflection.Metadata": "1.2.0",
    "xunit": "2.1.0",
    "xunit.runner.console": "2.1.0"
  },

--- a/src/Samples/CSharp/CopyPasteWithUsing/project.json
+++ b/src/Samples/CSharp/CopyPasteWithUsing/project.json
 {
  "dependencies": {
-    "Microsoft.Composition": "1.0.27",
+    "Microsoft.Composition": "1.0.27"
-    "System.Reflection.Metadata": "1.2.0",
-    "System.Collections.Immutable": "1.1.37"
  },
  "frameworks": {
    "net46": {}

--- a/src/Samples/CSharp/FormatSolution/project.json
+++ b/src/Samples/CSharp/FormatSolution/project.json
 {
  "dependencies": {
-    "Microsoft.Composition": "1.0.27",
+    "Microsoft.Composition": "1.0.27"
-    "System.Reflection.Metadata": "1.2.0",
-    "System.Collections.Immutable": "1.1.37"
  },
  "frameworks": {
    "net452": {}

--- a/src/Samples/CSharp/ImplementNotifyPropertyChanged/Impl/project.json
+++ b/src/Samples/CSharp/ImplementNotifyPropertyChanged/Impl/project.json
 {
  "dependencies": {
-    "Microsoft.Composition": "1.0.27",
+    "Microsoft.Composition": "1.0.27"
-    "System.Reflection.Metadata": "1.2.0",
-    "System.Collections.Immutable": "1.1.37"
  },
  "frameworks": {
    "net452": {}

--- a/src/Samples/CSharp/ImplementNotifyPropertyChanged/Test/project.json
+++ b/src/Samples/CSharp/ImplementNotifyPropertyChanged/Test/project.json
 {
  "dependencies": {
-    "System.Collections.Immutable": "1.1.37",
-    "System.Reflection.Metadata": "1.2.0",
    "xunit": "2.1.0",
    "xunit.runner.console": "2.1.0"
  },

--- a/src/Samples/CSharp/MakeConst/Impl/project.json
+++ b/src/Samples/CSharp/MakeConst/Impl/project.json
 {
  "dependencies": {
-    "Microsoft.Composition": "1.0.27",
+    "Microsoft.Composition": "1.0.27"
-    "System.Reflection.Metadata": "1.2.0",
-    "System.Collections.Immutable": "1.1.37"
  },
  "frameworks": {
    "net452": {}

--- a/src/Samples/CSharp/RefOutModifier/project.json
+++ b/src/Samples/CSharp/RefOutModifier/project.json
 {
  "dependencies": {
-    "Microsoft.Composition": "1.0.27",
+    "Microsoft.Composition": "1.0.27"
-    "System.Reflection.Metadata": "1.2.0",
-    "System.Collections.Immutable": "1.1.37"
  },
  "frameworks": {
    "net46": {}

--- a/src/Samples/CSharp/TreeTransforms/project.json
+++ b/src/Samples/CSharp/TreeTransforms/project.json
 {
  "dependencies": {
-    "System.Collections.Immutable": "1.1.37",
-    "System.Reflection.Metadata": "1.2.0"
  },
  "frameworks": {
    "net452": {}

--- a/src/Samples/Samples.sln
+++ b/src/Samples/Samples.sln
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 14
-VisualStudioVersion = 14.0.24720.0
+VisualStudioVersion = 14.0.25123.0
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "APISampleUnitTestsCS", "CSharp\APISampleUnitTests\APISampleUnitTestsCS.csproj", "{CFF49CC1-85B5-49F7-B14B-A6EBF2592DD2}"
 EndProject
@@ -115,6 +115,15 @@ Project("{F184B08F-C81C-45F6-A57F-5ABD9991F28F}") = "RemoveByValVB.UnitTests", "
 EndProject
 Project("{F184B08F-C81C-45F6-A57F-5ABD9991F28F}") = "TreeTransformsVB", "VisualBasic\TreeTransforms\TreeTransformsVB.vbproj", "{D89124D4-FB1D-4D08-BD95-F60BD24D5965}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Dependencies", "Dependencies", "{D14160E0-ACA0-4D2D-A670-CB72A57225F2}"
+	ProjectSection(SolutionItems) = preProject
+		..\Dependencies\ReadMe.txt = ..\Dependencies\ReadMe.txt
+	EndProjectSection
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Immutable", "..\Dependencies\Immutable\Immutable.csproj", "{030F8AB1-D06D-4526-ADEC-8E6010899C71}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Metadata", "..\Dependencies\Metadata\Metadata.csproj", "{B36C94C7-F34C-43BC-8834-0B9EEA6DD4DF}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -481,6 +490,30 @@ Global
 		{D89124D4-FB1D-4D08-BD95-F60BD24D5965}.Release|Mixed Platforms.Build.0 = Release|x86
 		{D89124D4-FB1D-4D08-BD95-F60BD24D5965}.Release|x86.ActiveCfg = Release|x86
 		{D89124D4-FB1D-4D08-BD95-F60BD24D5965}.Release|x86.Build.0 = Release|x86
+		{030F8AB1-D06D-4526-ADEC-8E6010899C71}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{030F8AB1-D06D-4526-ADEC-8E6010899C71}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{030F8AB1-D06D-4526-ADEC-8E6010899C71}.Debug|Mixed Platforms.ActiveCfg = Debug|Any CPU
+		{030F8AB1-D06D-4526-ADEC-8E6010899C71}.Debug|Mixed Platforms.Build.0 = Debug|Any CPU
+		{030F8AB1-D06D-4526-ADEC-8E6010899C71}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{030F8AB1-D06D-4526-ADEC-8E6010899C71}.Debug|x86.Build.0 = Debug|Any CPU
+		{030F8AB1-D06D-4526-ADEC-8E6010899C71}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{030F8AB1-D06D-4526-ADEC-8E6010899C71}.Release|Any CPU.Build.0 = Release|Any CPU
+		{030F8AB1-D06D-4526-ADEC-8E6010899C71}.Release|Mixed Platforms.ActiveCfg = Release|Any CPU
+		{030F8AB1-D06D-4526-ADEC-8E6010899C71}.Release|Mixed Platforms.Build.0 = Release|Any CPU
+		{030F8AB1-D06D-4526-ADEC-8E6010899C71}.Release|x86.ActiveCfg = Release|Any CPU
+		{030F8AB1-D06D-4526-ADEC-8E6010899C71}.Release|x86.Build.0 = Release|Any CPU
+		{B36C94C7-F34C-43BC-8834-0B9EEA6DD4DF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{B36C94C7-F34C-43BC-8834-0B9EEA6DD4DF}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{B36C94C7-F34C-43BC-8834-0B9EEA6DD4DF}.Debug|Mixed Platforms.ActiveCfg = Debug|Any CPU
+		{B36C94C7-F34C-43BC-8834-0B9EEA6DD4DF}.Debug|Mixed Platforms.Build.0 = Debug|Any CPU
+		{B36C94C7-F34C-43BC-8834-0B9EEA6DD4DF}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{B36C94C7-F34C-43BC-8834-0B9EEA6DD4DF}.Debug|x86.Build.0 = Debug|Any CPU
+		{B36C94C7-F34C-43BC-8834-0B9EEA6DD4DF}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{B36C94C7-F34C-43BC-8834-0B9EEA6DD4DF}.Release|Any CPU.Build.0 = Release|Any CPU
+		{B36C94C7-F34C-43BC-8834-0B9EEA6DD4DF}.Release|Mixed Platforms.ActiveCfg = Release|Any CPU
+		{B36C94C7-F34C-43BC-8834-0B9EEA6DD4DF}.Release|Mixed Platforms.Build.0 = Release|Any CPU
+		{B36C94C7-F34C-43BC-8834-0B9EEA6DD4DF}.Release|x86.ActiveCfg = Release|Any CPU
+		{B36C94C7-F34C-43BC-8834-0B9EEA6DD4DF}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -536,5 +569,7 @@ Global
 		{4900921D-C548-4FBB-9681-BAF88E09DB3C} = {B4EA92BD-CB82-465D-864C-0630A50CD40B}
 		{D4D09B9B-8421-40B9-B4A9-594DAD5AF8DD} = {B4EA92BD-CB82-465D-864C-0630A50CD40B}
 		{D89124D4-FB1D-4D08-BD95-F60BD24D5965} = {87DABD98-F9EB-4723-A466-9B7AF11E390D}
+		{030F8AB1-D06D-4526-ADEC-8E6010899C71} = {D14160E0-ACA0-4D2D-A670-CB72A57225F2}
+		{B36C94C7-F34C-43BC-8834-0B9EEA6DD4DF} = {D14160E0-ACA0-4D2D-A670-CB72A57225F2}
 	EndGlobalSection
 EndGlobal
--- a/src/Samples/Shared/UnitTestFramework/project.json
+++ b/src/Samples/Shared/UnitTestFramework/project.json
 {
  "dependencies": {
    "Moq": "4.2.1402.2112",
-    "System.Collections.Immutable": "1.1.37",
    "xunit": "2.1.0"
  },
  "frameworks": {

--- a/src/Samples/VisualBasic/APISampleUnitTests/project.json
+++ b/src/Samples/VisualBasic/APISampleUnitTests/project.json
 {
  "dependencies": {
-    "System.Collections.Immutable": "1.1.37",
-    "System.Reflection.Metadata": "1.2.0",
    "xunit": "2.1.0",
    "xunit.runner.console": "2.1.0"
  },

--- a/src/Samples/VisualBasic/Analyzers/BasicAnalyzers/BasicAnalyzers.Test/project.json
+++ b/src/Samples/VisualBasic/Analyzers/BasicAnalyzers/BasicAnalyzers.Test/project.json
 {
    "dependencies": {
-        "Microsoft.Composition": "1.0.27",
+        "Microsoft.Composition": "1.0.27"
-        "System.Collections.Immutable": "1.1.37",
-        "System.Reflection.Metadata": "1.2.0"
    },
    "frameworks": {
        "net452": {}

--- a/src/Samples/VisualBasic/Analyzers/BasicAnalyzers/BasicAnalyzers/project.json
+++ b/src/Samples/VisualBasic/Analyzers/BasicAnalyzers/BasicAnalyzers/project.json
 {
-    "dependencies": {
+  "dependencies": {
-        "Microsoft.Composition": "1.0.27",
+    "Microsoft.Composition": "1.0.27"
-        "System.Collections.Immutable": "1.1.37",
-        "System.Reflection.Metadata": "1.2.0"
-    },
+  },
-    "frameworks": {
+  "frameworks": {
-        ".NETPortable,Version=v4.5,Profile=Profile7": {}
+    ".NETPortable,Version=v4.5,Profile=Profile7": { }
-    }
+  }
 }
\ No newline at end of file
--- a/src/Samples/VisualBasic/ConsoleClassifier/project.json
+++ b/src/Samples/VisualBasic/ConsoleClassifier/project.json
 {
  "dependencies": {
-    "System.Collections.Immutable": "1.1.37",
-    "System.Reflection.Metadata": "1.2.0"
  },
  "frameworks": {
    "net452": {}

--- a/src/Samples/VisualBasic/ConvertToAutoProperty/Impl/project.json
+++ b/src/Samples/VisualBasic/ConvertToAutoProperty/Impl/project.json
 {
  "dependencies": {
-    "Microsoft.Composition": "1.0.27",
+    "Microsoft.Composition": "1.0.27"
-    "System.Collections.Immutable": "1.1.37",
-    "System.Reflection.Metadata": "1.2.0"
  },
  "frameworks": {
    "net452": {}

--- a/src/Samples/VisualBasic/ConvertToAutoProperty/Test/project.json
+++ b/src/Samples/VisualBasic/ConvertToAutoProperty/Test/project.json
 {
  "dependencies": {
-    "System.Collections.Immutable": "1.1.37",
    "xunit": "2.1.0",
    "xunit.runner.console": "2.1.0"
  },

--- a/src/Samples/VisualBasic/FormatSolution/project.json
+++ b/src/Samples/VisualBasic/FormatSolution/project.json
 {
  "dependencies": {
-    "System.Collections.Immutable": "1.1.37",
-    "System.Reflection.Metadata": "1.2.0"
  },
  "frameworks": {
    "net452": {}

--- a/src/Samples/VisualBasic/ImplementNotifyPropertyChanged/Impl/project.json
+++ b/src/Samples/VisualBasic/ImplementNotifyPropertyChanged/Impl/project.json
 {
  "dependencies": {
-    "Microsoft.Composition": "1.0.27",
+    "Microsoft.Composition": "1.0.27"
-    "System.Collections.Immutable": "1.1.37",
-    "System.Reflection.Metadata": "1.2.0"
  },
  "frameworks": {
    "net452": {}

--- a/src/Samples/VisualBasic/ImplementNotifyPropertyChanged/Test/project.json
+++ b/src/Samples/VisualBasic/ImplementNotifyPropertyChanged/Test/project.json
 {
  "dependencies": {
-    "System.Collections.Immutable": "1.1.37",
-    "System.Reflection.Metadata": "1.2.0",
    "xunit": "2.1.0",
    "xunit.runner.console": "2.1.0"
  },

--- a/src/Samples/VisualBasic/MakeConst/Impl/project.json
+++ b/src/Samples/VisualBasic/MakeConst/Impl/project.json
 {
  "dependencies": {
-    "Microsoft.Composition": "1.0.27",
+    "Microsoft.Composition": "1.0.27"
-    "System.Collections.Immutable": "1.1.37",
-    "System.Reflection.Metadata": "1.2.0"
  },
  "frameworks": {
    "net452": {}

--- a/src/Samples/VisualBasic/RemoveByVal/Impl/project.json
+++ b/src/Samples/VisualBasic/RemoveByVal/Impl/project.json
 {
  "dependencies": {
-    "Microsoft.Composition": "1.0.27",
+    "Microsoft.Composition": "1.0.27"
-    "System.Collections.Immutable": "1.1.37",
-    "System.Reflection.Metadata": "1.2.0"
  },
  "frameworks": {
    "net46": {}

--- a/src/Samples/VisualBasic/RemoveByVal/Test/project.json
+++ b/src/Samples/VisualBasic/RemoveByVal/Test/project.json
 {
  "dependencies": {
-    "System.Collections.Immutable": "1.1.37",
-    "System.Reflection.Metadata": "1.2.0",
    "xunit": "2.1.0",
    "xunit.runner.console": "2.1.0"
  },

--- a/src/Samples/VisualBasic/TreeTransforms/project.json
+++ b/src/Samples/VisualBasic/TreeTransforms/project.json
 {
  "dependencies": {
-    "Microsoft.Composition": "1.0.27",
+    "Microsoft.Composition": "1.0.27"
-    "System.Collections.Immutable": "1.1.37",
-    "System.Reflection.Metadata": "1.2.0"
  },
  "frameworks": {
    "net452": {}

--- a/src/Scripting/Core/project.json
+++ b/src/Scripting/Core/project.json
@@ -3,7 +3,6 @@
    "Microsoft.NETCore.Portable.Compatibility": "1.0.0",
    "System.AppContext": "4.0.0",
    "System.Collections": "4.0.10",
-    "System.Collections.Immutable": "1.1.37",
    "System.Diagnostics.Debug": "4.0.10",
    "System.Diagnostics.StackTrace": "4.0.0",
    "System.Diagnostics.Tools": "4.0.0",

--- a/src/Test/PdbUtilities/PdbUtilities.csproj
+++ b/src/Test/PdbUtilities/PdbUtilities.csproj
@@ -139,6 +139,18 @@
      <Project>{f83343ba-b4ea-451c-b6db-5d645e6171bc}</Project>
      <Name>Microsoft.DiaSymReader.PortablePdb</Name>
    </ProjectReference>
+    <ProjectReference Include="..\..\Dependencies\DiaSymReader\DiaSymReader.csproj">
+      <Project>{27b7a354-80cc-4bac-abf5-d4081056cea9}</Project>
+      <Name>DiaSymReader</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\..\Dependencies\Immutable\Immutable.csproj">
+      <Project>{030f8ab1-d06d-4526-adec-8e6010899c71}</Project>
+      <Name>Immutable</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\..\Dependencies\Metadata\Metadata.csproj">
+      <Project>{b36c94c7-f34c-43bc-8834-0b9eea6dd4df}</Project>
+      <Name>Metadata</Name>
+    </ProjectReference>
  </ItemGroup>
  <Import Project="..\..\Compilers\Core\SharedCollections\SharedCollections.projitems" Label="Shared" />
  <ImportGroup Label="Targets">

--- a/src/Test/PdbUtilities/project.json
+++ b/src/Test/PdbUtilities/project.json
 {
  "supports": {},
  "dependencies": {
-    "Microsoft.DiaSymReader": "1.0.7",
+    "Microsoft.DiaSymReader.Native": "1.3.3"
-    "Microsoft.DiaSymReader.Native": "1.3.3",
-    "System.Collections.Immutable": "1.1.37",
-    "System.Reflection.Metadata": "1.2.0"
  },
  "frameworks": {
    ".NETPortable,Version=v4.5,Profile=Profile7": {}

--- a/src/Test/Utilities/Desktop/TestUtilities.Desktop.csproj
+++ b/src/Test/Utilities/Desktop/TestUtilities.Desktop.csproj
@@ -30,6 +30,10 @@
      <Project>{7FE6B002-89D8-4298-9B1B-0B5C247DD1FD}</Project>
      <Name>CompilerTestResources</Name>
    </ProjectReference>
+    <ProjectReference Include="..\..\..\Dependencies\DiaSymReader\DiaSymReader.csproj">
+      <Project>{27b7a354-80cc-4bac-abf5-d4081056cea9}</Project>
+      <Name>DiaSymReader</Name>
+    </ProjectReference>
    <ProjectReference Include="..\Portable.FX45\TestUtilities.FX45.csproj">
      <Project>{F7712928-1175-47B3-8819-EE086753DEE2}</Project>
      <Name>TestUtilities.FX45</Name>

--- a/src/Test/Utilities/Desktop/project.json
+++ b/src/Test/Utilities/Desktop/project.json
 {
  "dependencies": {
    "Microsoft.CodeAnalysis.Test.Resources.Proprietary": "1.2.0-beta1-20160105-04",
-    "Microsoft.DiaSymReader": "1.0.7",
+    "Microsoft.DiaSymReader.Native": "1.3.3",    
-    "Microsoft.DiaSymReader.Native": "1.3.3",
-    "System.Collections.Immutable": "1.1.37",
-    "System.Reflection.Metadata": "1.2.0",
    "xunit": "2.1.0"
  },
  "frameworks": {

--- a/src/Test/Utilities/Portable.FX45/TestUtilities.FX45.csproj
+++ b/src/Test/Utilities/Portable.FX45/TestUtilities.FX45.csproj
@@ -19,6 +19,10 @@
    <CopyNuGetImplementations>true</CopyNuGetImplementations>
  </PropertyGroup>
  <ItemGroup Label="Project References">
+    <ProjectReference Include="..\..\..\Dependencies\DiaSymReader\DiaSymReader.csproj">
+      <Project>{27b7a354-80cc-4bac-abf5-d4081056cea9}</Project>
+      <Name>DiaSymReader</Name>
+    </ProjectReference>
    <ProjectReference Include="..\..\PdbUtilities\PdbUtilities.csproj">
      <Project>{afde6bea-5038-4a4a-a88e-dbd2e4088eed}</Project>
      <Name>PdbUtilities</Name>
@@ -125,4 +129,4 @@
    <Import Project="..\..\..\..\build\Targets\VSL.Imports.targets" />
    <Import Project="..\..\..\..\build\Targets\Roslyn.Toolsets.Xunit.targets" />
  </ImportGroup>
 </Project>
\ No newline at end of file
--- a/src/Test/Utilities/Portable.FX45/project.json
+++ b/src/Test/Utilities/Portable.FX45/project.json
 {
  "dependencies": {
    "Microsoft.CodeAnalysis.Test.Resources.Proprietary": "1.2.0-beta1-20160105-04",
-    "Microsoft.DiaSymReader": "1.0.7",
-    "System.Collections.Immutable": "1.1.37",
-    "System.Reflection.Metadata": "1.2.0",
    "xunit": "2.1.0"
  },
  "frameworks": {

--- a/src/Test/Utilities/Portable/project.json
+++ b/src/Test/Utilities/Portable/project.json
@@ -3,8 +3,7 @@
    "Microsoft.CSharp": "4.0.0",
    "Microsoft.NETCore.Platforms": "1.0.1-rc2-23931",
    "Microsoft.NETCore.Portable.Compatibility": "1.0.0",
-    "System.Collections.Concurrent": "4.0.10",
+    "System.Collections.Concurrent": "4.0.10",    
-    "System.Collections.Immutable": "1.1.37",
    "System.Console": "4.0.0-rc2-23931",
    "System.Diagnostics.Debug": "4.0.10",
    "System.Diagnostics.Tools": "4.0.0",

--- a/src/Tools/BuildUtil/BuildUtil.sln
+++ b/src/Tools/BuildUtil/BuildUtil.sln
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 14
-VisualStudioVersion = 14.0.23107.0
+VisualStudioVersion = 14.0.25123.0
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "BuildUtil", "BuildUtil\BuildUtil.csproj", "{0792DC0A-6F5A-44E8-BB08-0A8241083E38}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Dependencies", "Dependencies", "{EC7D1C78-30D7-43E5-AED4-1F58D15366D3}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Immutable", "..\..\Dependencies\Immutable\Immutable.csproj", "{030F8AB1-D06D-4526-ADEC-8E6010899C71}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -15,8 +19,15 @@ Global
 		{0792DC0A-6F5A-44E8-BB08-0A8241083E38}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{0792DC0A-6F5A-44E8-BB08-0A8241083E38}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{0792DC0A-6F5A-44E8-BB08-0A8241083E38}.Release|Any CPU.Build.0 = Release|Any CPU
+		{030F8AB1-D06D-4526-ADEC-8E6010899C71}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{030F8AB1-D06D-4526-ADEC-8E6010899C71}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{030F8AB1-D06D-4526-ADEC-8E6010899C71}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{030F8AB1-D06D-4526-ADEC-8E6010899C71}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
 	EndGlobalSection
+	GlobalSection(NestedProjects) = preSolution
+		{030F8AB1-D06D-4526-ADEC-8E6010899C71} = {EC7D1C78-30D7-43E5-AED4-1F58D15366D3}
+	EndGlobalSection
 EndGlobal
--- a/src/Tools/BuildUtil/BuildUtil/BuildUtil.csproj
+++ b/src/Tools/BuildUtil/BuildUtil/BuildUtil.csproj
@@ -56,5 +56,11 @@
  <ItemGroup>
    <Folder Include="Properties\" />
  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\..\..\Dependencies\Immutable\Immutable.csproj">
+      <Project>{030f8ab1-d06d-4526-adec-8e6010899c71}</Project>
+      <Name>Immutable</Name>
+    </ProjectReference>
+  </ItemGroup>
  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\Portable\$(TargetFrameworkVersion)\Microsoft.Portable.CSharp.targets" />
 </Project>
\ No newline at end of file
--- a/src/Tools/BuildUtil/BuildUtil/project.json
+++ b/src/Tools/BuildUtil/BuildUtil/project.json
@@ -9,8 +9,7 @@
    "Microsoft.Build.Utilities.Core": "0.1.0-preview-00005",
    "Microsoft.NETCore": "5.0.0",
    "Microsoft.NETCore.Portable.Compatibility": "1.0.0",
-    "NuSpec.ReferenceGenerator": "1.4.2",
+    "NuSpec.ReferenceGenerator": "1.4.2"
-    "System.Collections.Immutable": "1.1.37"
  },
  "frameworks": {
    "dotnet": {}

--- a/src/Tools/ProcessWatchdog/ProcessWatchdog.csproj
+++ b/src/Tools/ProcessWatchdog/ProcessWatchdog.csproj
@@ -52,6 +52,16 @@
      <LastGenOutput>Resources.Designer.cs</LastGenOutput>
    </EmbeddedResource>
  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\..\Dependencies\Immutable\Immutable.csproj">
+      <Project>{030f8ab1-d06d-4526-adec-8e6010899c71}</Project>
+      <Name>Immutable</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\..\Dependencies\Metadata\Metadata.csproj">
+      <Project>{b36c94c7-f34c-43bc-8834-0b9eea6dd4df}</Project>
+      <Name>Metadata</Name>
+    </ProjectReference>
+  </ItemGroup>
  <ImportGroup Label="Targets">
    <Import Project="..\..\..\build\Targets\VSL.Imports.targets" />
  </ImportGroup>

--- a/src/Tools/ProcessWatchdog/project.json
+++ b/src/Tools/ProcessWatchdog/project.json
 {
  "dependencies": {
-    "CommandLineParser": "2.0.273-beta",
+    "CommandLineParser": "2.0.273-beta"
-    "System.Collections.Immutable": "1.1.37",
-    "System.Reflection.Metadata": "1.2.0-rc2-23826"
  },
  "frameworks": {
    "net45": {}

--- a/src/Tools/Source/Pdb2Xml/Pdb2Xml.csproj
+++ b/src/Tools/Source/Pdb2Xml/Pdb2Xml.csproj
@@ -27,6 +27,10 @@
    <Compile Include="PdbToXmlApp.cs" />
  </ItemGroup>
  <ItemGroup>
+    <ProjectReference Include="..\..\..\Dependencies\DiaSymReader\DiaSymReader.csproj">
+      <Project>{27b7a354-80cc-4bac-abf5-d4081056cea9}</Project>
+      <Name>DiaSymReader</Name>
+    </ProjectReference>
    <ProjectReference Include="..\..\..\Test\PdbUtilities\PdbUtilities.csproj">
      <Project>{afde6bea-5038-4a4a-a88e-dbd2e4088eed}</Project>
      <Name>PdbUtilities</Name>

--- a/src/Tools/Source/Pdb2Xml/project.json
+++ b/src/Tools/Source/Pdb2Xml/project.json
 {
  "dependencies": {
-    "Microsoft.DiaSymReader": "1.0.7"
  },
  "frameworks": {
    "net45": {}

--- a/src/Tools/Source/RunTests/RunTests.csproj
+++ b/src/Tools/Source/RunTests/RunTests.csproj
@@ -50,6 +50,16 @@
  <ItemGroup>
    <None Include="project.json" />
  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\..\..\Dependencies\Immutable\Immutable.csproj">
+      <Project>{030f8ab1-d06d-4526-adec-8e6010899c71}</Project>
+      <Name>Immutable</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\..\..\Dependencies\Metadata\Metadata.csproj">
+      <Project>{b36c94c7-f34c-43bc-8834-0b9eea6dd4df}</Project>
+      <Name>Metadata</Name>
+    </ProjectReference>
+  </ItemGroup>
  <ImportGroup Label="Targets">
    <Import Project="..\..\..\..\build\Targets\VSL.Imports.targets" />
  </ImportGroup>

--- a/src/Tools/Source/RunTests/project.json
+++ b/src/Tools/Source/RunTests/project.json
 {
  "dependencies": { 
    "Newtonsoft.Json": "8.0.2",
-    "RestSharp": "105.2.3",
+    "RestSharp": "105.2.3"
-    "System.Collections.Immutable": "1.1.37",
-    "System.Reflection.Metadata": "1.2.0"
  },
  "frameworks": {
    "net45": { }

--- a/src/VisualStudio/Core/Def/ServicesVisualStudio.csproj
+++ b/src/VisualStudio/Core/Def/ServicesVisualStudio.csproj
@@ -206,6 +206,10 @@
      <Project>{1EE8CAD3-55F9-4D91-96B2-084641DA9A6C}</Project>
      <Name>CodeAnalysis</Name>
    </ProjectReference>
+    <ProjectReference Include="..\..\..\Dependencies\DiaSymReader\DiaSymReader.csproj">
+      <Project>{27b7a354-80cc-4bac-abf5-d4081056cea9}</Project>
+      <Name>DiaSymReader</Name>
+    </ProjectReference>
    <ProjectReference Include="..\..\..\Workspaces\Core\Desktop\Workspaces.Desktop.csproj">
      <Project>{2e87fa96-50bb-4607-8676-46521599f998}</Project>
      <Name>Workspaces.Desktop</Name>
@@ -826,4 +830,4 @@
  <ImportGroup Label="Targets">
    <Import Project="..\..\..\..\build\Targets\VSL.Imports.targets" />
  </ImportGroup>
 </Project>
\ No newline at end of file
--- a/src/VisualStudio/Core/Def/project.json
+++ b/src/VisualStudio/Core/Def/project.json
@@ -2,7 +2,6 @@
  "dependencies": {
    "ManagedEsent": "1.9.2.0",
    "Microsoft.Composition": "1.0.27",
-    "Microsoft.DiaSymReader": "1.0.7-beta1-51221",
    "Microsoft.CodeAnalysis.Elfie": "0.10.6-rc2",
    "Microsoft.VisualStudio.Shell.Immutable.14.0": "14.1.24720",
    "NuGet.VisualStudio": { "version": "3.3.0", "suppressParent": "all" },