diff --git a/build/dependencies.props b/build/dependencies.props
index 85681bb4a0..11afdc2485 100644
--- a/build/dependencies.props
+++ b/build/dependencies.props
@@ -2,85 +2,30 @@
   <!-- These package version may be overridden or updated by automation. -->
   <PropertyGroup Label="Package Versions: Auto" Condition=" '$(DotNetPackageVersionPropsPath)' == '' ">
     <MicrosoftCSharpPackageVersion>4.5.0-preview2-26403-05</MicrosoftCSharpPackageVersion>
-    <MicrosoftDotNetPlatformAbstractionsPackageVersion>2.1.0-preview2-26403-06</MicrosoftDotNetPlatformAbstractionsPackageVersion>
     <MicrosoftExtensionsDependencyModelPackageVersion>2.1.0-preview2-26403-06</MicrosoftExtensionsDependencyModelPackageVersion>
     <!-- MicrosoftNETCoreApp21PackageVersion is assigned at the bottom so it can automatically pick up MicrosoftNETCoreAppPackageVersion in an orchestrated build. -->
     <MicrosoftNETCoreAppPackageVersion>2.1.0-preview2-26403-06</MicrosoftNETCoreAppPackageVersion>
-    <MicrosoftNETCoreDotNetAppHostPackageVersion>2.1.0-preview2-26403-06</MicrosoftNETCoreDotNetAppHostPackageVersion>
-    <MicrosoftNETCoreDotNetHostPolicyPackageVersion>2.1.0-preview2-26403-06</MicrosoftNETCoreDotNetHostPolicyPackageVersion>
-    <MicrosoftNETCoreDotNetHostResolverPackageVersion>2.1.0-preview2-26403-06</MicrosoftNETCoreDotNetHostResolverPackageVersion>
-    <MicrosoftNETCorePlatformsPackageVersion>2.1.0-preview2-26403-05</MicrosoftNETCorePlatformsPackageVersion>
     <MicrosoftWin32RegistryPackageVersion>4.5.0-preview2-26403-05</MicrosoftWin32RegistryPackageVersion>
     <NuGetFrameworksPackageVersion>4.7.0-preview4.5065</NuGetFrameworksPackageVersion>
-    <RuntimeAlpine36X64MicrosoftNETCoreAppPackageVersion>2.1.0-preview2-26403-06</RuntimeAlpine36X64MicrosoftNETCoreAppPackageVersion>
-    <RuntimeAlpine36X64MicrosoftNETCoreDotNetAppHostPackageVersion>2.1.0-preview2-26403-06</RuntimeAlpine36X64MicrosoftNETCoreDotNetAppHostPackageVersion>
-    <RuntimeAlpine36X64MicrosoftNETCoreDotNetHostPackageVersion>2.1.0-preview2-26403-06</RuntimeAlpine36X64MicrosoftNETCoreDotNetHostPackageVersion>
-    <RuntimeAlpine36X64MicrosoftNETCoreDotNetHostPolicyPackageVersion>2.1.0-preview2-26403-06</RuntimeAlpine36X64MicrosoftNETCoreDotNetHostPolicyPackageVersion>
-    <RuntimeAlpine36X64MicrosoftNETCoreDotNetHostResolverPackageVersion>2.1.0-preview2-26403-06</RuntimeAlpine36X64MicrosoftNETCoreDotNetHostResolverPackageVersion>
-    <RuntimeLinuxArmMicrosoftNETCoreAppPackageVersion>2.1.0-preview2-26403-06</RuntimeLinuxArmMicrosoftNETCoreAppPackageVersion>
-    <RuntimeLinuxArmMicrosoftNETCoreDotNetAppHostPackageVersion>2.1.0-preview2-26403-06</RuntimeLinuxArmMicrosoftNETCoreDotNetAppHostPackageVersion>
-    <RuntimeLinuxArmMicrosoftNETCoreDotNetHostPackageVersion>2.1.0-preview2-26403-06</RuntimeLinuxArmMicrosoftNETCoreDotNetHostPackageVersion>
-    <RuntimeLinuxArmMicrosoftNETCoreDotNetHostPolicyPackageVersion>2.1.0-preview2-26403-06</RuntimeLinuxArmMicrosoftNETCoreDotNetHostPolicyPackageVersion>
-    <RuntimeLinuxArmMicrosoftNETCoreDotNetHostResolverPackageVersion>2.1.0-preview2-26403-06</RuntimeLinuxArmMicrosoftNETCoreDotNetHostResolverPackageVersion>
-    <RuntimeLinuxX64MicrosoftNETCoreAppPackageVersion>2.1.0-preview2-26403-06</RuntimeLinuxX64MicrosoftNETCoreAppPackageVersion>
-    <RuntimeLinuxX64MicrosoftNETCoreDotNetAppHostPackageVersion>2.1.0-preview2-26403-06</RuntimeLinuxX64MicrosoftNETCoreDotNetAppHostPackageVersion>
-    <RuntimeLinuxX64MicrosoftNETCoreDotNetHostPackageVersion>2.1.0-preview2-26403-06</RuntimeLinuxX64MicrosoftNETCoreDotNetHostPackageVersion>
-    <RuntimeLinuxX64MicrosoftNETCoreDotNetHostPolicyPackageVersion>2.1.0-preview2-26403-06</RuntimeLinuxX64MicrosoftNETCoreDotNetHostPolicyPackageVersion>
-    <RuntimeLinuxX64MicrosoftNETCoreDotNetHostResolverPackageVersion>2.1.0-preview2-26403-06</RuntimeLinuxX64MicrosoftNETCoreDotNetHostResolverPackageVersion>
-    <RuntimeOsxX64MicrosoftNETCoreAppPackageVersion>2.1.0-preview2-26403-06</RuntimeOsxX64MicrosoftNETCoreAppPackageVersion>
-    <RuntimeOsxX64MicrosoftNETCoreDotNetAppHostPackageVersion>2.1.0-preview2-26403-06</RuntimeOsxX64MicrosoftNETCoreDotNetAppHostPackageVersion>
-    <RuntimeOsxX64MicrosoftNETCoreDotNetHostPackageVersion>2.1.0-preview2-26403-06</RuntimeOsxX64MicrosoftNETCoreDotNetHostPackageVersion>
-    <RuntimeOsxX64MicrosoftNETCoreDotNetHostPolicyPackageVersion>2.1.0-preview2-26403-06</RuntimeOsxX64MicrosoftNETCoreDotNetHostPolicyPackageVersion>
-    <RuntimeOsxX64MicrosoftNETCoreDotNetHostResolverPackageVersion>2.1.0-preview2-26403-06</RuntimeOsxX64MicrosoftNETCoreDotNetHostResolverPackageVersion>
-    <RuntimeWinX64MicrosoftNETCoreAppPackageVersion>2.1.0-preview2-26403-06</RuntimeWinX64MicrosoftNETCoreAppPackageVersion>
-    <RuntimeWinX64MicrosoftNETCoreDotNetAppHostPackageVersion>2.1.0-preview2-26403-06</RuntimeWinX64MicrosoftNETCoreDotNetAppHostPackageVersion>
-    <RuntimeWinX64MicrosoftNETCoreDotNetHostPackageVersion>2.1.0-preview2-26403-06</RuntimeWinX64MicrosoftNETCoreDotNetHostPackageVersion>
-    <RuntimeWinX64MicrosoftNETCoreDotNetHostPolicyPackageVersion>2.1.0-preview2-26403-06</RuntimeWinX64MicrosoftNETCoreDotNetHostPolicyPackageVersion>
-    <RuntimeWinX64MicrosoftNETCoreDotNetHostResolverPackageVersion>2.1.0-preview2-26403-06</RuntimeWinX64MicrosoftNETCoreDotNetHostResolverPackageVersion>
-    <RuntimeWinX86MicrosoftNETCoreAppPackageVersion>2.1.0-preview2-26403-06</RuntimeWinX86MicrosoftNETCoreAppPackageVersion>
-    <RuntimeWinX86MicrosoftNETCoreDotNetAppHostPackageVersion>2.1.0-preview2-26403-06</RuntimeWinX86MicrosoftNETCoreDotNetAppHostPackageVersion>
-    <RuntimeWinX86MicrosoftNETCoreDotNetHostPackageVersion>2.1.0-preview2-26403-06</RuntimeWinX86MicrosoftNETCoreDotNetHostPackageVersion>
-    <RuntimeWinX86MicrosoftNETCoreDotNetHostPolicyPackageVersion>2.1.0-preview2-26403-06</RuntimeWinX86MicrosoftNETCoreDotNetHostPolicyPackageVersion>
-    <RuntimeWinX86MicrosoftNETCoreDotNetHostResolverPackageVersion>2.1.0-preview2-26403-06</RuntimeWinX86MicrosoftNETCoreDotNetHostResolverPackageVersion>
     <SystemBuffersPackageVersion>4.5.0-preview2-26403-05</SystemBuffersPackageVersion>
-    <SystemCodeDomPackageVersion>4.5.0-preview2-26403-05</SystemCodeDomPackageVersion>
     <SystemCollectionsImmutablePackageVersion>1.5.0-preview2-26403-05</SystemCollectionsImmutablePackageVersion>
     <SystemComponentModelAnnotationsPackageVersion>4.5.0-preview2-26403-05</SystemComponentModelAnnotationsPackageVersion>
-    <SystemCompositionAttributedModelPackageVersion>1.2.0-preview2-26403-05</SystemCompositionAttributedModelPackageVersion>
-    <SystemCompositionConventionPackageVersion>1.2.0-preview2-26403-05</SystemCompositionConventionPackageVersion>
-    <SystemCompositionHostingPackageVersion>1.2.0-preview2-26403-05</SystemCompositionHostingPackageVersion>
-    <SystemCompositionPackageVersion>1.2.0-preview2-26403-05</SystemCompositionPackageVersion>
-    <SystemCompositionRuntimePackageVersion>1.2.0-preview2-26403-05</SystemCompositionRuntimePackageVersion>
-    <SystemCompositionTypedPartsPackageVersion>1.2.0-preview2-26403-05</SystemCompositionTypedPartsPackageVersion>
-    <SystemConfigurationConfigurationManagerPackageVersion>4.5.0-preview2-26403-05</SystemConfigurationConfigurationManagerPackageVersion>
     <SystemDataSqlClientPackageVersion>4.5.0-preview2-26403-05</SystemDataSqlClientPackageVersion>
     <SystemDiagnosticsDiagnosticSourcePackageVersion>4.5.0-preview2-26403-05</SystemDiagnosticsDiagnosticSourcePackageVersion>
     <SystemDiagnosticsEventLogPackageVersion>4.5.0-preview2-26403-05</SystemDiagnosticsEventLogPackageVersion>
-    <SystemIOFileSystemAccessControlPackageVersion>4.5.0-preview2-26403-05</SystemIOFileSystemAccessControlPackageVersion>
-    <SystemIOPackagingPackageVersion>4.5.0-preview2-26403-05</SystemIOPackagingPackageVersion>
-    <SystemIOPipesAccessControlPackageVersion>4.5.0-preview2-26403-05</SystemIOPipesAccessControlPackageVersion>
     <SystemIOPipelinesPackageVersion>4.5.0-preview2-26403-05</SystemIOPipelinesPackageVersion>
-    <SystemIOPortsPackageVersion>4.5.0-preview2-26403-05</SystemIOPortsPackageVersion>
-    <SystemJsonPackageVersion>4.5.0-preview2-26403-05</SystemJsonPackageVersion>
     <SystemMemoryPackageVersion>4.5.0-preview2-26403-05</SystemMemoryPackageVersion>
     <SystemNetHttpWinHttpHandlerPackageVersion>4.5.0-preview2-26403-05</SystemNetHttpWinHttpHandlerPackageVersion>
     <SystemNetWebSocketsWebSocketProtocolPackageVersion>4.5.0-preview2-26403-05</SystemNetWebSocketsWebSocketProtocolPackageVersion>
     <SystemNumericsVectorsPackageVersion>4.5.0-preview2-26403-05</SystemNumericsVectorsPackageVersion>
-    <SystemReflectionDispatchProxyPackageVersion>4.5.0-preview2-26403-05</SystemReflectionDispatchProxyPackageVersion>
     <SystemReflectionMetadataPackageVersion>1.6.0-preview2-26403-05</SystemReflectionMetadataPackageVersion>
-    <SystemReflectionTypeExtensionsPackageVersion>4.5.0-preview2-26403-05</SystemReflectionTypeExtensionsPackageVersion>
     <SystemRuntimeCompilerServicesUnsafePackageVersion>4.5.0-preview2-26403-05</SystemRuntimeCompilerServicesUnsafePackageVersion>
-    <SystemSecurityAccessControlPackageVersion>4.5.0-preview2-26403-05</SystemSecurityAccessControlPackageVersion>
     <SystemSecurityCryptographyCngPackageVersion>4.5.0-preview2-26403-05</SystemSecurityCryptographyCngPackageVersion>
-    <SystemSecurityCryptographyPkcsPackageVersion>4.5.0-preview2-26403-05</SystemSecurityCryptographyPkcsPackageVersion>
-    <SystemSecurityCryptographyProtectedDataPackageVersion>4.5.0-preview2-26403-05</SystemSecurityCryptographyProtectedDataPackageVersion>
     <SystemSecurityCryptographyXmlPackageVersion>4.5.0-preview2-26403-05</SystemSecurityCryptographyXmlPackageVersion>
     <SystemSecurityPermissionsPackageVersion>4.5.0-preview2-26403-05</SystemSecurityPermissionsPackageVersion>
     <SystemSecurityPrincipalWindowsPackageVersion>4.5.0-preview2-26403-05</SystemSecurityPrincipalWindowsPackageVersion>
     <SystemServiceProcessServiceControllerPackageVersion>4.5.0-preview2-26403-05</SystemServiceProcessServiceControllerPackageVersion>
-    <SystemTextEncodingCodePagesPackageVersion>4.5.0-preview2-26403-05</SystemTextEncodingCodePagesPackageVersion>
     <SystemTextEncodingsWebPackageVersion>4.5.0-preview2-26403-05</SystemTextEncodingsWebPackageVersion>
-    <SystemThreadingAccessControlPackageVersion>4.5.0-preview2-26403-05</SystemThreadingAccessControlPackageVersion>
     <SystemThreadingChannelsPackageVersion>4.5.0-preview2-26403-05</SystemThreadingChannelsPackageVersion>
     <SystemThreadingTasksDataflowPackageVersion>4.9.0-preview2-26403-05</SystemThreadingTasksDataflowPackageVersion>
     <SystemThreadingTasksExtensionsPackageVersion>4.5.0-preview2-26403-05</SystemThreadingTasksExtensionsPackageVersion>
@@ -96,20 +41,17 @@
     <!-- Determined by build tools -->
     <InternalAspNetCoreSdkPackageVersion>$(KoreBuildVersion)</InternalAspNetCoreSdkPackageVersion>
     <InternalAspNetCoreSiteExtensionSdkPackageVersion>$(KoreBuildVersion)</InternalAspNetCoreSiteExtensionSdkPackageVersion>
-    <MicrosoftAspNetCoreBuildToolsApiCheckPackageVersion>$(KoreBuildVersion)</MicrosoftAspNetCoreBuildToolsApiCheckPackageVersion>
   </PropertyGroup>
 
   <!-- These are package versions that should not be overridden or updated by automation. -->
   <PropertyGroup Label="Package Versions: Pinned">
     <AngleSharpPackageVersion>0.9.9</AngleSharpPackageVersion>
     <BenchmarkDotNetPackageVersion>0.10.13</BenchmarkDotNetPackageVersion>
-    <BuildBundlerMinifierPackageVersion>2.4.337</BuildBundlerMinifierPackageVersion>
     <CastleCorePackageVersion>4.2.1</CastleCorePackageVersion>
     <DevDependency_MicrosoftDotNetBuildTasksFeedPackageVersion>2.1.0-prerelease-02430-04</DevDependency_MicrosoftDotNetBuildTasksFeedPackageVersion>
     <DevDependency_MicrosoftExtensionsDependencyModelPackageVersion>2.0.0</DevDependency_MicrosoftExtensionsDependencyModelPackageVersion>
     <DevDependency_WindowsAzureStoragePackageVersion>8.7.0</DevDependency_WindowsAzureStoragePackageVersion>
     <FSharpCorePackageVersion>4.2.1</FSharpCorePackageVersion>
-    <FSharpNETSdkPackageVersion>1.0.5</FSharpNETSdkPackageVersion>
     <GoogleProtobufPackageVersion>3.1.0</GoogleProtobufPackageVersion>
     <LibuvPackageVersion>1.10.0</LibuvPackageVersion>
     <MicrosoftApplicationInsightsAspNetCorePackageVersion>2.1.1</MicrosoftApplicationInsightsAspNetCorePackageVersion>
@@ -127,13 +69,6 @@
     <MicrosoftCodeAnalysisCommonPackageVersion>2.6.1</MicrosoftCodeAnalysisCommonPackageVersion>
     <MicrosoftCodeAnalysisCSharpPackageVersion>2.6.1</MicrosoftCodeAnalysisCSharpPackageVersion>
     <MicrosoftCodeAnalysisCSharpWorkspacesPackageVersion>2.6.1</MicrosoftCodeAnalysisCSharpWorkspacesPackageVersion>
-    <MicrosoftCodeAnalysisEditorFeaturesPackageVersion>2.6.1</MicrosoftCodeAnalysisEditorFeaturesPackageVersion>
-    <MicrosoftCodeAnalysisEditorFeaturesTextPackageVersion>2.6.1</MicrosoftCodeAnalysisEditorFeaturesTextPackageVersion>
-    <MicrosoftCodeAnalysisFeaturesPackageVersion>2.6.1</MicrosoftCodeAnalysisFeaturesPackageVersion>
-    <MicrosoftCodeAnalysisPackageVersion>2.6.1</MicrosoftCodeAnalysisPackageVersion>
-    <MicrosoftCodeAnalysisVisualBasicPackageVersion>2.6.1</MicrosoftCodeAnalysisVisualBasicPackageVersion>
-    <MicrosoftCodeAnalysisVisualBasicWorkspacesPackageVersion>2.6.1</MicrosoftCodeAnalysisVisualBasicWorkspacesPackageVersion>
-    <MicrosoftCodeAnalysisWorkspacesCommonPackageVersion>2.6.1</MicrosoftCodeAnalysisWorkspacesCommonPackageVersion>
     <MicrosoftDiaSymReaderNativePackageVersion>1.7.0</MicrosoftDiaSymReaderNativePackageVersion>
     <MicrosoftDotNetArchivePackageVersion>0.2.0-beta-62606-02</MicrosoftDotNetArchivePackageVersion>
     <MicrosoftDotNetProjectModelPackageVersion>1.0.0-rc3-003121</MicrosoftDotNetProjectModelPackageVersion>
@@ -146,15 +81,12 @@
     <MicrosoftNETCoreApp20PackageVersion>2.0.0</MicrosoftNETCoreApp20PackageVersion>
     <MicrosoftNETCoreWindowsApiSetsPackageVersion>1.0.1</MicrosoftNETCoreWindowsApiSetsPackageVersion>
     <MicrosoftNETTestSdkPackageVersion>15.6.1</MicrosoftNETTestSdkPackageVersion>
-    <MicrosoftOwinPackageVersion>3.0.1</MicrosoftOwinPackageVersion>
     <MicrosoftOwinSecurityCookiesPackageVersion>3.0.1</MicrosoftOwinSecurityCookiesPackageVersion>
     <MicrosoftOwinSecurityPackageVersion>3.0.1</MicrosoftOwinSecurityPackageVersion>
     <MicrosoftOwinTestingPackageVersion>3.0.1</MicrosoftOwinTestingPackageVersion>
     <MicrosoftVisualStudioComponentModelHostPackageVersion>15.0.26606</MicrosoftVisualStudioComponentModelHostPackageVersion>
-    <MicrosoftVisualStudioCoreUtilityPackageVersion>15.6.161-preview</MicrosoftVisualStudioCoreUtilityPackageVersion>
     <MicrosoftVisualStudioEditorPackageVersion>15.6.161-preview</MicrosoftVisualStudioEditorPackageVersion>
     <MicrosoftVisualStudioLanguageIntellisensePackageVersion>15.6.161-preview</MicrosoftVisualStudioLanguageIntellisensePackageVersion>
-    <MicrosoftVisualStudioLanguageServicesPackageVersion>2.6.1</MicrosoftVisualStudioLanguageServicesPackageVersion>
     <MicrosoftVisualStudioOLEInteropPackageVersion>7.10.6070</MicrosoftVisualStudioOLEInteropPackageVersion>
     <MicrosoftVisualStudioProjectSystemAnalyzersPackageVersion>15.3.224</MicrosoftVisualStudioProjectSystemAnalyzersPackageVersion>
     <MicrosoftVisualStudioProjectSystemManagedVSPackageVersion>2.0.6142705</MicrosoftVisualStudioProjectSystemManagedVSPackageVersion>
@@ -166,11 +98,7 @@
     <MicrosoftVisualStudioShellInterop80PackageVersion>8.0.50727</MicrosoftVisualStudioShellInterop80PackageVersion>
     <MicrosoftVisualStudioShellInterop90PackageVersion>9.0.30729</MicrosoftVisualStudioShellInterop90PackageVersion>
     <MicrosoftVisualStudioShellInteropPackageVersion>7.10.6071</MicrosoftVisualStudioShellInteropPackageVersion>
-    <MicrosoftVisualStudioTextDataPackageVersion>15.6.161-preview</MicrosoftVisualStudioTextDataPackageVersion>
-    <MicrosoftVisualStudioTextLogicPackageVersion>15.6.161-preview</MicrosoftVisualStudioTextLogicPackageVersion>
     <MicrosoftVisualStudioTextUIPackageVersion>15.6.161-preview</MicrosoftVisualStudioTextUIPackageVersion>
-    <MicrosoftVisualStudioTextUIWpfPackageVersion>15.6.161-preview</MicrosoftVisualStudioTextUIWpfPackageVersion>
-    <MicrosoftWebAdministrationPackageVersion>7.0.0</MicrosoftWebAdministrationPackageVersion>
     <MicrosoftWebXdtPackageVersion>1.4.0</MicrosoftWebXdtPackageVersion>
     <MonoAddinsPackageVersion>1.3.8</MonoAddinsPackageVersion>
     <MonoDevelopSdkPackageVersion>1.0.1</MonoDevelopSdkPackageVersion>
@@ -194,7 +122,6 @@
     <StyleCopAnalyzersPackageVersion>1.0.0</StyleCopAnalyzersPackageVersion>
     <SystemIdentityModelTokensJwtPackageVersion>5.2.0</SystemIdentityModelTokensJwtPackageVersion>
     <SystemInteractiveAsyncPackageVersion>3.1.1</SystemInteractiveAsyncPackageVersion>
-    <SystemManagementAutomationPackageVersion>6.1.7601.17515</SystemManagementAutomationPackageVersion>
     <SystemNetHttpPackageVersion>4.3.2</SystemNetHttpPackageVersion>
     <SystemReactiveLinqPackageVersion>3.1.1</SystemReactiveLinqPackageVersion>
     <SystemReflectionEmitPackageVersion>4.3.0</SystemReflectionEmitPackageVersion>
@@ -205,11 +132,7 @@
     <VSIX_MicrosoftCodeAnalysisCSharpPackageVersion>2.7.0-beta3-62512-06</VSIX_MicrosoftCodeAnalysisCSharpPackageVersion>
     <VSIX_MicrosoftCodeAnalysisCSharpWorkspacesPackageVersion>2.7.0-beta3-62512-06</VSIX_MicrosoftCodeAnalysisCSharpWorkspacesPackageVersion>
     <VSIX_MicrosoftCodeAnalysisEditorFeaturesTextPackageVersion>2.7.0-beta3-62512-06</VSIX_MicrosoftCodeAnalysisEditorFeaturesTextPackageVersion>
-    <VSIX_MicrosoftCodeAnalysisFeaturesPackageVersion>2.7.0-beta3-62512-06</VSIX_MicrosoftCodeAnalysisFeaturesPackageVersion>
-    <VSIX_MicrosoftCodeAnalysisPackageVersion>2.7.0-beta3-62512-06</VSIX_MicrosoftCodeAnalysisPackageVersion>
     <VSIX_MicrosoftCodeAnalysisRemoteRazorServiceHubPackageVersion>2.7.0-beta3-62512-06</VSIX_MicrosoftCodeAnalysisRemoteRazorServiceHubPackageVersion>
-    <VSIX_MicrosoftCodeAnalysisRemoteWorkspacesPackageVersion>2.7.0-beta3-62512-06</VSIX_MicrosoftCodeAnalysisRemoteWorkspacesPackageVersion>
-    <VSIX_MicrosoftCodeAnalysisVisualBasicPackageVersion>2.7.0-beta3-62512-06</VSIX_MicrosoftCodeAnalysisVisualBasicPackageVersion>
     <VSIX_MicrosoftCodeAnalysisVisualBasicWorkspacesPackageVersion>2.7.0-beta3-62512-06</VSIX_MicrosoftCodeAnalysisVisualBasicWorkspacesPackageVersion>
     <VSIX_MicrosoftCodeAnalysisWorkspacesCommonPackageVersion>2.7.0-beta3-62512-06</VSIX_MicrosoftCodeAnalysisWorkspacesCommonPackageVersion>
     <VSIX_MicrosoftVisualStudioLanguageServicesPackageVersion>2.7.0-beta3-62512-06</VSIX_MicrosoftVisualStudioLanguageServicesPackageVersion>
diff --git a/build/external-dependencies.props b/build/external-dependencies.props
index 4d86192b53..1f0d434a39 100644
--- a/build/external-dependencies.props
+++ b/build/external-dependencies.props
@@ -19,10 +19,8 @@
   <ItemGroup>
     <ExternalDependency Include="AngleSharp" Version="$(AngleSharpPackageVersion)" Private="true" />
     <ExternalDependency Include="BenchmarkDotNet" Version="$(BenchmarkDotNetPackageVersion)" Private="true" />
-    <ExternalDependency Include="BuildBundlerMinifier" Version="$(BuildBundlerMinifierPackageVersion)" Private="true" />
     <ExternalDependency Include="Castle.Core" Version="$(CastleCorePackageVersion)" />
     <ExternalDependency Include="FSharp.Core" Version="$(FSharpCorePackageVersion)" Private="true" />
-    <ExternalDependency Include="FSharp.NET.Sdk" Version="$(FSharpNETSdkPackageVersion)" Private="true" />
     <ExternalDependency Include="Google.Protobuf" Version="$(GoogleProtobufPackageVersion)" Private="true" />
     <ExternalDependency Include="Internal.AspNetCore.Sdk" Version="$(InternalAspNetCoreSdkPackageVersion)" Private="true" />
     <ExternalDependency Include="Internal.AspNetCore.SiteExtension.Sdk" Version="$(InternalAspNetCoreSiteExtensionSdkPackageVersion)" Private="true" />
@@ -30,7 +28,6 @@
     <ExternalDependency Include="Microsoft.ApplicationInsights.AspNetCore" Version="$(MicrosoftApplicationInsightsAspNetCorePackageVersion)" />
     <ExternalDependency Include="Microsoft.AspNet.Identity.EntityFramework" Version="$(MicrosoftAspNetIdentityEntityFrameworkPackageVersion)" />
     <ExternalDependency Include="Microsoft.AspNet.WebApi.Client" Version="$(MicrosoftAspNetWebApiClientPackageVersion)" AppMetapackage="true" AllMetapackage="true"/>
-    <ExternalDependency Include="Microsoft.AspNetCore.BuildTools.ApiCheck" Version="$(MicrosoftAspNetCoreBuildToolsApiCheckPackageVersion)" Private="true" />
     <ExternalDependency Include="Microsoft.Azure.DocumentDB.Core" Version="$(MicrosoftAzureDocumentDBCorePackageVersion)" />
     <ExternalDependency Include="Microsoft.Azure.KeyVault" Version="$(MicrosoftAzureKeyVaultPackageVersion)" />
     <ExternalDependency Include="Microsoft.Azure.Management.Fluent" Version="$(MicrosoftAzureManagementFluentPackageVersion)" />
@@ -42,8 +39,6 @@
     <ExternalDependency Include="Microsoft.Build.Utilities.Core" Version="$(MicrosoftBuildUtilitiesCorePackageVersion)" />
 
     <!-- Razor uses a custom version of roslyn packages -->
-    <ExternalDependency Include="Microsoft.CodeAnalysis" Version="$(MicrosoftCodeAnalysisPackageVersion)" />
-    <ExternalDependency Include="Microsoft.CodeAnalysis" Version="$(VSIX_MicrosoftCodeAnalysisPackageVersion)" Private="true" VariableName="VSIX_MicrosoftCodeAnalysisPackageVersion" />
     <ExternalDependency Include="Microsoft.CodeAnalysis.Common" Version="$(MicrosoftCodeAnalysisCommonPackageVersion)" />
     <ExternalDependency Include="Microsoft.CodeAnalysis.Common" Version="$(VSIX_MicrosoftCodeAnalysisCommonPackageVersion)" Private="true" VariableName="VSIX_MicrosoftCodeAnalysisCommonPackageVersion" />
     <ExternalDependency Include="Microsoft.CodeAnalysis.CSharp" Version="$(MicrosoftCodeAnalysisCSharpPackageVersion)" />
@@ -51,26 +46,15 @@
     <ExternalDependency Include="Microsoft.CodeAnalysis.CSharp.Features" Version="$(VSIX_MicrosoftCodeAnalysisCSharpFeaturesPackageVersion)" Private="true" VariableName="VSIX_MicrosoftCodeAnalysisCSharpFeaturesPackageVersion" />
     <ExternalDependency Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="$(MicrosoftCodeAnalysisCSharpWorkspacesPackageVersion)" />
     <ExternalDependency Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="$(VSIX_MicrosoftCodeAnalysisCSharpWorkspacesPackageVersion)" Private="true" VariableName="VSIX_MicrosoftCodeAnalysisCSharpWorkspacesPackageVersion" />
-    <ExternalDependency Include="Microsoft.CodeAnalysis.EditorFeatures" Version="$(MicrosoftCodeAnalysisEditorFeaturesPackageVersion)" />
-    <ExternalDependency Include="Microsoft.CodeAnalysis.EditorFeatures.Text" Version="$(MicrosoftCodeAnalysisEditorFeaturesTextPackageVersion)" />
     <ExternalDependency Include="Microsoft.CodeAnalysis.EditorFeatures.Text" Version="$(VSIX_MicrosoftCodeAnalysisEditorFeaturesTextPackageVersion)" Private="true" VariableName="VSIX_MicrosoftCodeAnalysisEditorFeaturesTextPackageVersion" />
-    <ExternalDependency Include="Microsoft.CodeAnalysis.Features" Version="$(MicrosoftCodeAnalysisFeaturesPackageVersion)" />
-    <ExternalDependency Include="Microsoft.CodeAnalysis.Features" Version="$(VSIX_MicrosoftCodeAnalysisFeaturesPackageVersion)" Private="true" VariableName="VSIX_MicrosoftCodeAnalysisFeaturesPackageVersion" />
     <ExternalDependency Include="Microsoft.CodeAnalysis.Remote.Razor.ServiceHub" Version="$(VSIX_MicrosoftCodeAnalysisRemoteRazorServiceHubPackageVersion)" Private="true" VariableName="VSIX_MicrosoftCodeAnalysisRemoteRazorServiceHubPackageVersion" />
-    <ExternalDependency Include="Microsoft.CodeAnalysis.Remote.Workspaces" Version="$(VSIX_MicrosoftCodeAnalysisRemoteWorkspacesPackageVersion)" Private="true" VariableName="VSIX_MicrosoftCodeAnalysisRemoteWorkspacesPackageVersion" />
-    <ExternalDependency Include="Microsoft.CodeAnalysis.VisualBasic" Version="$(MicrosoftCodeAnalysisVisualBasicPackageVersion)" />
-    <ExternalDependency Include="Microsoft.CodeAnalysis.VisualBasic" Version="$(VSIX_MicrosoftCodeAnalysisVisualBasicPackageVersion)" Private="true" VariableName="VSIX_MicrosoftCodeAnalysisVisualBasicPackageVersion" />
-    <ExternalDependency Include="Microsoft.CodeAnalysis.VisualBasic.Workspaces" Version="$(MicrosoftCodeAnalysisVisualBasicWorkspacesPackageVersion)" />
     <ExternalDependency Include="Microsoft.CodeAnalysis.VisualBasic.Workspaces" Version="$(VSIX_MicrosoftCodeAnalysisVisualBasicWorkspacesPackageVersion)" Private="true" VariableName="VSIX_MicrosoftCodeAnalysisVisualBasicWorkspacesPackageVersion" />
-    <ExternalDependency Include="Microsoft.CodeAnalysis.Workspaces.Common" Version="$(MicrosoftCodeAnalysisWorkspacesCommonPackageVersion)" />
     <ExternalDependency Include="Microsoft.CodeAnalysis.Workspaces.Common" Version="$(VSIX_MicrosoftCodeAnalysisWorkspacesCommonPackageVersion)" Private="true" VariableName="VSIX_MicrosoftCodeAnalysisWorkspacesCommonPackageVersion" />
 
     <ExternalDependency Include="Microsoft.CSharp" Version="$(MicrosoftCSharpPackageVersion)" />
-    <ExternalDependency Include="Microsoft.DotNet.PlatformAbstractions" Version="$(MicrosoftDotNetPlatformAbstractionsPackageVersion)" />
     <ExternalDependency Include="Microsoft.DotNet.ProjectModel" Version="$(MicrosoftDotNetProjectModelPackageVersion)" Private="true" />
     <ExternalDependency Include="Microsoft.DiaSymReader.Native" Version="$(MicrosoftDiaSymReaderNativePackageVersion)" />
     <ExternalDependency Include="Microsoft.Extensions.DependencyModel" Version="$(MicrosoftExtensionsDependencyModelPackageVersion)" />
-    <ExternalDependency Include="Microsoft.Extensions.PlatformAbstractions" Version="$(MicrosoftExtensionsPlatformAbstractionsPackageVersion)" />
     <ExternalDependency Include="Microsoft.IdentityModel.Clients.ActiveDirectory" Version="$(MicrosoftIdentityModelClientsActiveDirectoryPackageVersion)" />
     <ExternalDependency Include="Microsoft.IdentityModel.Protocols.OpenIdConnect" Version="$(MicrosoftIdentityModelProtocolsOpenIdConnectPackageVersion)" />
     <ExternalDependency Include="Microsoft.IdentityModel.Protocols.WsFederation" Version="$(MicrosoftIdentityModelProtocolsWsFederationPackageVersion)" />
@@ -82,20 +66,13 @@
     <ExternalDependency Include="Microsoft.NETCore.App" Version="$(MicrosoftNETCoreApp20PackageVersion)" VariableName="MicrosoftNETCoreApp20PackageVersion" />
     <ExternalDependency Include="Microsoft.NETCore.App" Version="$(MicrosoftNETCoreApp21PackageVersion)" VariableName="MicrosoftNETCoreApp21PackageVersion" />
 
-    <ExternalDependency Include="Microsoft.NETCore.DotNetAppHost" Version="$(MicrosoftNETCoreDotNetAppHostPackageVersion)" />
-    <ExternalDependency Include="Microsoft.NETCore.DotNetHostPolicy" Version="$(MicrosoftNETCoreDotNetHostPolicyPackageVersion)" />
-    <ExternalDependency Include="Microsoft.NETCore.DotNetHostResolver" Version="$(MicrosoftNETCoreDotNetHostResolverPackageVersion)" />
-    <ExternalDependency Include="Microsoft.NETCore.Platforms" Version="$(MicrosoftNETCorePlatformsPackageVersion)" />
     <ExternalDependency Include="Microsoft.NETCore.Windows.ApiSets" Version="$(MicrosoftNETCoreWindowsApiSetsPackageVersion)" />
-    <ExternalDependency Include="Microsoft.Owin" Version="$(MicrosoftOwinPackageVersion)" />
     <ExternalDependency Include="Microsoft.Owin.Security" Version="$(MicrosoftOwinSecurityPackageVersion)" />
     <ExternalDependency Include="Microsoft.Owin.Security.Cookies" Version="$(MicrosoftOwinSecurityCookiesPackageVersion)" />
     <ExternalDependency Include="Microsoft.Owin.Testing" Version="$(MicrosoftOwinTestingPackageVersion)" Private="true" />
     <ExternalDependency Include="Microsoft.VisualStudio.ComponentModelHost" Version="$(MicrosoftVisualStudioComponentModelHostPackageVersion)" Private="true" />
-    <ExternalDependency Include="Microsoft.VisualStudio.CoreUtility" Version="$(MicrosoftVisualStudioCoreUtilityPackageVersion)" Private="true" />
     <ExternalDependency Include="Microsoft.VisualStudio.Editor" Version="$(MicrosoftVisualStudioEditorPackageVersion)" Private="true" />
     <ExternalDependency Include="Microsoft.VisualStudio.Language.Intellisense" Version="$(MicrosoftVisualStudioLanguageIntellisensePackageVersion)" Private="true" />
-    <ExternalDependency Include="Microsoft.VisualStudio.LanguageServices" Version="$(MicrosoftVisualStudioLanguageServicesPackageVersion)" Private="true" />
     <ExternalDependency Include="Microsoft.VisualStudio.LanguageServices" Version="$(VSIX_MicrosoftVisualStudioLanguageServicesPackageVersion)" Private="true" VariableName="VSIX_MicrosoftVisualStudioLanguageServicesPackageVersion" />
     <ExternalDependency Include="Microsoft.VisualStudio.LanguageServices.Razor.RemoteClient" Version="$(VSIX_MicrosoftVisualStudioLanguageServicesRazorRemoteClientPackageVersion)" Private="true" VariableName="VSIX_MicrosoftVisualStudioLanguageServicesRazorRemoteClientPackageVersion" />
     <ExternalDependency Include="Microsoft.VisualStudio.OLE.Interop" Version="$(MicrosoftVisualStudioOLEInteropPackageVersion)" Private="true" />
@@ -109,11 +86,7 @@
     <ExternalDependency Include="Microsoft.VisualStudio.Shell.Interop.12.0" Version="$(MicrosoftVisualStudioShellInterop120PackageVersion)" Private="true" />
     <ExternalDependency Include="Microsoft.VisualStudio.Shell.Interop.8.0" Version="$(MicrosoftVisualStudioShellInterop80PackageVersion)" Private="true" />
     <ExternalDependency Include="Microsoft.VisualStudio.Shell.Interop.9.0" Version="$(MicrosoftVisualStudioShellInterop90PackageVersion)" Private="true" />
-    <ExternalDependency Include="Microsoft.VisualStudio.Text.Data" Version="$(MicrosoftVisualStudioTextDataPackageVersion)" Private="true" />
-    <ExternalDependency Include="Microsoft.VisualStudio.Text.Logic" Version="$(MicrosoftVisualStudioTextLogicPackageVersion)" Private="true" />
     <ExternalDependency Include="Microsoft.VisualStudio.Text.UI" Version="$(MicrosoftVisualStudioTextUIPackageVersion)" Private="true" />
-    <ExternalDependency Include="Microsoft.VisualStudio.Text.UI.Wpf" Version="$(MicrosoftVisualStudioTextUIWpfPackageVersion)" Private="true" />
-    <ExternalDependency Include="Microsoft.Web.Administration" Version="$(MicrosoftWebAdministrationPackageVersion)" />
     <ExternalDependency Include="Microsoft.Web.Xdt" Version="$(MicrosoftWebXdtPackageVersion)" />
     <ExternalDependency Include="Microsoft.Win32.Registry" Version="$(MicrosoftWin32RegistryPackageVersion)" />
     <ExternalDependency Include="Mono.Addins" Version="$(MonoAddinsPackageVersion)" Private="true" />
@@ -137,36 +110,6 @@
     <ExternalDependency Include="Polly-Signed" Version="$(PollySignedPackageVersion)" />
     <ExternalDependency Include="Polly.Extensions.Http-Signed" Version="$(PollyExtensionsHttpSignedPackageVersion)" />
     <ExternalDependency Include="Remotion.Linq" Version="$(RemotionLinqPackageVersion)" />
-    <ExternalDependency Include="runtime.alpine.3.6-x64.Microsoft.NETCore.App" Version="$(RuntimeAlpine36X64MicrosoftNETCoreAppPackageVersion)" />
-    <ExternalDependency Include="runtime.alpine.3.6-x64.Microsoft.NETCore.DotNetAppHost" Version="$(RuntimeAlpine36X64MicrosoftNETCoreDotNetAppHostPackageVersion)" />
-    <ExternalDependency Include="runtime.alpine.3.6-x64.Microsoft.NETCore.DotNetHost" Version="$(RuntimeAlpine36X64MicrosoftNETCoreDotNetHostPackageVersion)" />
-    <ExternalDependency Include="runtime.alpine.3.6-x64.Microsoft.NETCore.DotNetHostPolicy" Version="$(RuntimeAlpine36X64MicrosoftNETCoreDotNetHostPolicyPackageVersion)" />
-    <ExternalDependency Include="runtime.alpine.3.6-x64.Microsoft.NETCore.DotNetHostResolver" Version="$(RuntimeAlpine36X64MicrosoftNETCoreDotNetHostResolverPackageVersion)" />
-    <ExternalDependency Include="runtime.linux-arm.Microsoft.NETCore.App" Version="$(RuntimeLinuxArmMicrosoftNETCoreAppPackageVersion)" />
-    <ExternalDependency Include="runtime.linux-arm.Microsoft.NETCore.DotNetAppHost" Version="$(RuntimeLinuxArmMicrosoftNETCoreDotNetAppHostPackageVersion)" />
-    <ExternalDependency Include="runtime.linux-arm.Microsoft.NETCore.DotNetHost" Version="$(RuntimeLinuxArmMicrosoftNETCoreDotNetHostPackageVersion)" />
-    <ExternalDependency Include="runtime.linux-arm.Microsoft.NETCore.DotNetHostPolicy" Version="$(RuntimeLinuxArmMicrosoftNETCoreDotNetHostPolicyPackageVersion)" />
-    <ExternalDependency Include="runtime.linux-arm.Microsoft.NETCore.DotNetHostResolver" Version="$(RuntimeLinuxArmMicrosoftNETCoreDotNetHostResolverPackageVersion)" />
-    <ExternalDependency Include="runtime.linux-x64.Microsoft.NETCore.App" Version="$(RuntimeLinuxX64MicrosoftNETCoreAppPackageVersion)" />
-    <ExternalDependency Include="runtime.linux-x64.Microsoft.NETCore.DotNetAppHost" Version="$(RuntimeLinuxX64MicrosoftNETCoreDotNetAppHostPackageVersion)" />
-    <ExternalDependency Include="runtime.linux-x64.Microsoft.NETCore.DotNetHost" Version="$(RuntimeLinuxX64MicrosoftNETCoreDotNetHostPackageVersion)" />
-    <ExternalDependency Include="runtime.linux-x64.Microsoft.NETCore.DotNetHostPolicy" Version="$(RuntimeLinuxX64MicrosoftNETCoreDotNetHostPolicyPackageVersion)" />
-    <ExternalDependency Include="runtime.linux-x64.Microsoft.NETCore.DotNetHostResolver" Version="$(RuntimeLinuxX64MicrosoftNETCoreDotNetHostResolverPackageVersion)" />
-    <ExternalDependency Include="runtime.osx-x64.Microsoft.NETCore.App" Version="$(RuntimeOsxX64MicrosoftNETCoreAppPackageVersion)" />
-    <ExternalDependency Include="runtime.osx-x64.Microsoft.NETCore.DotNetAppHost" Version="$(RuntimeOsxX64MicrosoftNETCoreDotNetAppHostPackageVersion)" />
-    <ExternalDependency Include="runtime.osx-x64.Microsoft.NETCore.DotNetHost" Version="$(RuntimeOsxX64MicrosoftNETCoreDotNetHostPackageVersion)" />
-    <ExternalDependency Include="runtime.osx-x64.Microsoft.NETCore.DotNetHostPolicy" Version="$(RuntimeOsxX64MicrosoftNETCoreDotNetHostPolicyPackageVersion)" />
-    <ExternalDependency Include="runtime.osx-x64.Microsoft.NETCore.DotNetHostResolver" Version="$(RuntimeOsxX64MicrosoftNETCoreDotNetHostResolverPackageVersion)" />
-    <ExternalDependency Include="runtime.win-x64.Microsoft.NETCore.App" Version="$(RuntimeWinX64MicrosoftNETCoreAppPackageVersion)" />
-    <ExternalDependency Include="runtime.win-x64.Microsoft.NETCore.DotNetAppHost" Version="$(RuntimeWinX64MicrosoftNETCoreDotNetAppHostPackageVersion)" />
-    <ExternalDependency Include="runtime.win-x64.Microsoft.NETCore.DotNetHost" Version="$(RuntimeWinX64MicrosoftNETCoreDotNetHostPackageVersion)" />
-    <ExternalDependency Include="runtime.win-x64.Microsoft.NETCore.DotNetHostPolicy" Version="$(RuntimeWinX64MicrosoftNETCoreDotNetHostPolicyPackageVersion)" />
-    <ExternalDependency Include="runtime.win-x64.Microsoft.NETCore.DotNetHostResolver" Version="$(RuntimeWinX64MicrosoftNETCoreDotNetHostResolverPackageVersion)" />
-    <ExternalDependency Include="runtime.win-x86.Microsoft.NETCore.App" Version="$(RuntimeWinX86MicrosoftNETCoreAppPackageVersion)" />
-    <ExternalDependency Include="runtime.win-x86.Microsoft.NETCore.DotNetAppHost" Version="$(RuntimeWinX86MicrosoftNETCoreDotNetAppHostPackageVersion)" />
-    <ExternalDependency Include="runtime.win-x86.Microsoft.NETCore.DotNetHost" Version="$(RuntimeWinX86MicrosoftNETCoreDotNetHostPackageVersion)" />
-    <ExternalDependency Include="runtime.win-x86.Microsoft.NETCore.DotNetHostPolicy" Version="$(RuntimeWinX86MicrosoftNETCoreDotNetHostPolicyPackageVersion)" />
-    <ExternalDependency Include="runtime.win-x86.Microsoft.NETCore.DotNetHostResolver" Version="$(RuntimeWinX86MicrosoftNETCoreDotNetHostResolverPackageVersion)" />
     <ExternalDependency Include="Serilog.Extensions.Logging" Version="$(SerilogExtensionsLoggingPackageVersion)" />
     <ExternalDependency Include="Serilog.Sinks.File" Version="$(SerilogSinksFilePackageVersion)" />
     <ExternalDependency Include="SQLitePCLRaw.bundle_green" Version="$(SQLitePCLRawBundleGreenPackageVersion)" />
@@ -176,51 +119,30 @@
     <ExternalDependency Include="StreamJsonRpc" Version="$(StreamJsonRpcPackageVersion)" />
     <ExternalDependency Include="StyleCop.Analyzers" Version="$(StyleCopAnalyzersPackageVersion)" Private="true" />
     <ExternalDependency Include="System.Buffers" Version="$(SystemBuffersPackageVersion)" />
-    <ExternalDependency Include="System.CodeDom" Version="$(SystemCodeDomPackageVersion)" />
     <ExternalDependency Include="System.Collections.Immutable" Version="$(SystemCollectionsImmutablePackageVersion)" />
     <ExternalDependency Include="System.ComponentModel.Annotations" Version="$(SystemComponentModelAnnotationsPackageVersion)" />
-    <ExternalDependency Include="System.Composition" Version="$(SystemCompositionPackageVersion)" />
-    <ExternalDependency Include="System.Composition.AttributedModel" Version="$(SystemCompositionAttributedModelPackageVersion)" />
-    <ExternalDependency Include="System.Composition.Convention" Version="$(SystemCompositionConventionPackageVersion)" />
-    <ExternalDependency Include="System.Composition.Hosting" Version="$(SystemCompositionHostingPackageVersion)" />
-    <ExternalDependency Include="System.Composition.Runtime" Version="$(SystemCompositionRuntimePackageVersion)" />
-    <ExternalDependency Include="System.Composition.TypedParts" Version="$(SystemCompositionTypedPartsPackageVersion)" />
-    <ExternalDependency Include="System.Configuration.ConfigurationManager" Version="$(SystemConfigurationConfigurationManagerPackageVersion)" />
     <ExternalDependency Include="System.Data.SqlClient" Version="$(SystemDataSqlClientPackageVersion)" />
     <ExternalDependency Include="System.Diagnostics.DiagnosticSource" Version="$(SystemDiagnosticsDiagnosticSourcePackageVersion)" />
     <ExternalDependency Include="System.Diagnostics.EventLog" Version="$(SystemDiagnosticsEventLogPackageVersion)" />
     <ExternalDependency Include="System.IdentityModel.Tokens.Jwt" Version="$(SystemIdentityModelTokensJwtPackageVersion)" />
     <ExternalDependency Include="System.Interactive.Async" Version="$(SystemInteractiveAsyncPackageVersion)" />
-    <ExternalDependency Include="System.IO.FileSystem.AccessControl" Version="$(SystemIOFileSystemAccessControlPackageVersion)" />
-    <ExternalDependency Include="System.IO.Packaging" Version="$(SystemIOPackagingPackageVersion)" />
     <ExternalDependency Include="System.IO.Pipelines" Version="$(SystemIOPipelinesPackageVersion)" />
-    <ExternalDependency Include="System.IO.Pipes.AccessControl" Version="$(SystemIOPipesAccessControlPackageVersion)" />
-    <ExternalDependency Include="System.IO.Ports" Version="$(SystemIOPortsPackageVersion)" />
-    <ExternalDependency Include="System.Json" Version="$(SystemJsonPackageVersion)" />
-    <ExternalDependency Include="System.Management.Automation" Version="$(SystemManagementAutomationPackageVersion)" />
     <ExternalDependency Include="System.Memory" Version="$(SystemMemoryPackageVersion)" />
     <ExternalDependency Include="System.Net.Http" Version="$(SystemNetHttpPackageVersion)" />
     <ExternalDependency Include="System.Net.Http.WinHttpHandler" Version="$(SystemNetHttpWinHttpHandlerPackageVersion)" />
     <ExternalDependency Include="System.Net.WebSockets.WebSocketProtocol" Version="$(SystemNetWebSocketsWebSocketProtocolPackageVersion)" />
     <ExternalDependency Include="System.Numerics.Vectors" Version="$(SystemNumericsVectorsPackageVersion)" />
     <ExternalDependency Include="System.Reactive.Linq" Version="$(SystemReactiveLinqPackageVersion)" />
-    <ExternalDependency Include="System.Reflection.DispatchProxy" Version="$(SystemReflectionDispatchProxyPackageVersion)" />
     <ExternalDependency Include="System.Reflection.Emit" Version="$(SystemReflectionEmitPackageVersion)" />
     <ExternalDependency Include="System.Reflection.Metadata" Version="$(SystemReflectionMetadataPackageVersion)" />
-    <ExternalDependency Include="System.Reflection.TypeExtensions" Version="$(SystemReflectionTypeExtensionsPackageVersion)" />
     <ExternalDependency Include="System.Runtime.CompilerServices.Unsafe" Version="$(SystemRuntimeCompilerServicesUnsafePackageVersion)" />
     <ExternalDependency Include="System.Runtime.InteropServices.RuntimeInformation" Version="$(SystemRuntimeInteropServicesRuntimeInformationPackageVersion)" />
-    <ExternalDependency Include="System.Security.AccessControl" Version="$(SystemSecurityAccessControlPackageVersion)" />
     <ExternalDependency Include="System.Security.Cryptography.Cng" Version="$(SystemSecurityCryptographyCngPackageVersion)" />
-    <ExternalDependency Include="System.Security.Cryptography.Pkcs" Version="$(SystemSecurityCryptographyPkcsPackageVersion)" />
-    <ExternalDependency Include="System.Security.Cryptography.ProtectedData" Version="$(SystemSecurityCryptographyProtectedDataPackageVersion)" />
     <ExternalDependency Include="System.Security.Cryptography.Xml" Version="$(SystemSecurityCryptographyXmlPackageVersion)" />
     <ExternalDependency Include="System.Security.Permissions" Version="$(SystemSecurityPermissionsPackageVersion)" />
     <ExternalDependency Include="System.Security.Principal.Windows" Version="$(SystemSecurityPrincipalWindowsPackageVersion)" />
     <ExternalDependency Include="System.ServiceProcess.ServiceController" Version="$(SystemServiceProcessServiceControllerPackageVersion)" />
-    <ExternalDependency Include="System.Text.Encoding.CodePages" Version="$(SystemTextEncodingCodePagesPackageVersion)" />
     <ExternalDependency Include="System.Text.Encodings.Web" Version="$(SystemTextEncodingsWebPackageVersion)" />
-    <ExternalDependency Include="System.Threading.AccessControl" Version="$(SystemThreadingAccessControlPackageVersion)" />
     <ExternalDependency Include="System.Threading.Channels" Version="$(SystemThreadingChannelsPackageVersion)" />
     <ExternalDependency Include="System.Threading.Tasks.Dataflow" Version="$(SystemThreadingTasksDataflowPackageVersion)" />
     <ExternalDependency Include="System.Threading.Tasks.Extensions" Version="$(SystemThreadingTasksExtensionsPackageVersion)" />
diff --git a/build/tasks/AnalyzeBuildGraph.cs b/build/tasks/AnalyzeBuildGraph.cs
index 076706eef0..60baca737b 100644
--- a/build/tasks/AnalyzeBuildGraph.cs
+++ b/build/tasks/AnalyzeBuildGraph.cs
@@ -93,15 +93,19 @@ namespace RepoTasks
         {
             // ensure versions cascade
             var buildPackageMap = packages.ToDictionary(p => p.PackageInfo.Id, p => p, StringComparer.OrdinalIgnoreCase);
-            var dependencyMap = new Dictionary<string, List<string>>(StringComparer.OrdinalIgnoreCase);
+            var dependencyMap = new Dictionary<string, List<ExternalDependency>>(StringComparer.OrdinalIgnoreCase);
             foreach (var dep in Dependencies)
             {
                 if (!dependencyMap.TryGetValue(dep.ItemSpec, out var versions))
                 {
-                    dependencyMap[dep.ItemSpec] = versions = new List<string>();
+                    dependencyMap[dep.ItemSpec] = versions = new List<ExternalDependency>();
                 }
 
-                versions.Add(dep.GetMetadata("Version"));
+                versions.Add(new ExternalDependency
+                {
+                    PackageId = dep.ItemSpec,
+                    Version = dep.GetMetadata("Version"),
+                });
             }
 
             var inconsistentVersions = new List<VersionMismatch>();
@@ -115,15 +119,18 @@ namespace RepoTasks
             {
                 if (!buildPackageMap.TryGetValue(dependency.Key, out var package))
                 {
+                    var idx = -1;
                     // This dependency is not one of the packages that will be compiled by this run of Universe.
                     if (!dependencyMap.TryGetValue(dependency.Key, out var externalVersions)
-                        || !externalVersions.Contains(dependency.Value.Version))
+                        || (idx = externalVersions.FindIndex(0, externalVersions.Count, i => i.Version == dependency.Value.Version)) < 0)
                     {
                         Log.LogKoreBuildError(
                             project.FullPath,
                             KoreBuildErrors.UndefinedExternalDependency,
                             message: $"Undefined external dependency on {dependency.Key}/{dependency.Value.Version}");
                     }
+
+                    externalVersions[idx].IsReferenced = true;
                     continue;
                 }
 
@@ -174,6 +181,15 @@ namespace RepoTasks
                 Log.LogError("Package versions are inconsistent. See build log for details.");
             }
 
+            foreach (var versions in dependencyMap.Values)
+            {
+                foreach (var item in versions.Where(i => !i.IsReferenced))
+                {
+                    // See https://github.com/aspnet/Universe/wiki/Build-warning-and-error-codes#potentially-unused-external-dependency for details
+                    Log.LogMessage(MessageImportance.Normal, $"Potentially unused external dependency: {item.PackageId}/{item.Version}. See https://github.com/aspnet/Universe/wiki/Build-warning-and-error-codes for details.");
+                }
+            }
+
             foreach (var repo in reposThatShouldPatch)
             {
                 Log.LogError($"{repo} should not be a 'ShippedRepository'. Version changes in other repositories mean it should be patched to perserve cascading version upgrades.");
@@ -211,13 +227,13 @@ namespace RepoTasks
 
 
                         projectGroup.Add(new Project(proj.PackageId)
-                            {
-                                Repository = repo,
-                                PackageReferences = new HashSet<string>(proj
+                        {
+                            Repository = repo,
+                            PackageReferences = new HashSet<string>(proj
                                     .Frameworks
                                     .SelectMany(f => f.Dependencies.Keys)
                                     .Concat(proj.Tools.Select(t => t.Id)), StringComparer.OrdinalIgnoreCase),
-                            });
+                        });
                     }
 
                     foreach (var packageId in packages.Keys)
diff --git a/build/tasks/BuildGraph/ExternalDependency.cs b/build/tasks/BuildGraph/ExternalDependency.cs
new file mode 100644
index 0000000000..5bdc67d027
--- /dev/null
+++ b/build/tasks/BuildGraph/ExternalDependency.cs
@@ -0,0 +1,12 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+namespace RepoTools.BuildGraph
+{
+    internal class ExternalDependency
+    {
+        public string PackageId { get; set; }
+        public string Version { get; set; }
+        public bool IsReferenced { get; set; }
+    }
+}