Merge in 'release/5.0' changes

eng/targets/ResolveReferences.targets

@@ -134,17 +134,16 @@
     In addition, enforce use of Reference items for projects reference providers.
   -->
   <Target Name="_CheckForReferenceBoundaries" BeforeTargets="CollectPackageReferences;ResolveReferences">
+    <!-- Dependency graph checks may include unexpected packages. Ignore this because it's not an error. -->
     <Error
-        Condition="@(_InvalidReferenceToSharedFxOnlyAssembly->Count()) != 0"
+        Condition=" '$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)' AND
-        Text="Cannot reference &quot;%(_InvalidReferenceToSharedFxOnlyAssembly.Identity)&quot; directly because it is part of the shared framework and this project is not. Use &lt;FrameworkReference Include=&quot;Microsoft.AspNetCore.App&quot; /&gt; instead." />
+            '$(MSBuildRestoreSessionId)' != '' AND
-
+            @(_InvalidReferenceToNonSharedFxAssembly->Count()) != 0 "
-    <Error
+        Text="Cannot reference &quot;%(Identity)&quot;. This dependency is not in the shared framework. See docs/SharedFramework.md for instructions on how to modify what is in the shared framework." />
-        Condition="@(_InvalidReferenceToNonSharedFxAssembly->Count()) != 0 AND '$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'"
-        Text="Cannot reference &quot;%(_InvalidReferenceToNonSharedFxAssembly.Identity)&quot;. This dependency is not in the shared framework. See docs/SharedFramework.md for instructions on how to modify what is in the shared framework." />
 
     <Error
         Condition=" '$(EnableCustomReferenceResolution)' == 'true' AND @(_AllProjectReference->WithMetadataValue('DirectUse', '1')->Count()) != 0 "
-        Text="Cannot reference &quot;%(_AllProjectReference.Identity)&quot; with a ProjectReference item; use a Reference item." />
+        Text="Cannot reference &quot;%(Identity)&quot; with a ProjectReference item; use a Reference item." />
   </Target>
 
   <Target Name="_WarnAboutRedundantRef" AfterTargets="ResolveFrameworkReferences;ProcessFrameworkReferences">

src/Components/Ignitor/src/Ignitor.csproj

@@ -24,8 +24,6 @@
     <Reference Include="Microsoft.AspNetCore.SignalR.Client" />
     <Reference Include="Microsoft.AspNetCore.SignalR.Protocols.MessagePack" />
     <Reference Include="Microsoft.Extensions.Logging.Console" />
-    <!-- Avoid CS1705 errors due to mix of assemblies brought in transitively. -->
-    <Reference Include="Microsoft.AspNetCore.SignalR.Common" />
   </ItemGroup>
 
   <ItemGroup>

src/Components/Ignitor/test/Ignitor.Test.csproj

@@ -7,8 +7,6 @@
 
   <ItemGroup>
     <Reference Include="Ignitor" />
-    <!-- Avoid MSB3277 warnings due to dependencies brought in through Ignitor targeting netstandard2.0. -->
-    <Reference Include="System.Text.Json" />
   </ItemGroup>
 
   <ItemGroup>

src/Components/WebAssembly/testassets/HostedInAspNet.Server/HostedInAspNet.Server.csproj

@@ -14,8 +14,6 @@
     <Reference Include="Microsoft.AspNetCore.Components.WebAssembly.Server" />
     <Reference Include="Microsoft.AspNetCore.Diagnostics" />
     <Reference Include="Microsoft.Extensions.Hosting" />
-    <!-- Avoid MSB3277 warnings due to dependencies brought in through Microsoft.AspNetCore.Blazor targeting netstandard2.0. -->
-    <Reference Include="System.Text.Json" />
   </ItemGroup>
 
 </Project>

src/Components/WebAssembly/testassets/Wasm.Authentication.Server/Wasm.Authentication.Server.csproj

@@ -2,7 +2,6 @@
 
   <PropertyGroup>
     <TargetFramework>$(DefaultNetCoreTargetFramework)</TargetFramework>
-    <!-- Avoid CS1705 errors due to mix of assemblies brought in transitively. -->
 
     <!-- This project references the shared framework transitively. Prevent restore errors by setting this flag. -->
     <GenerateErrorForMissingTargetingPacks>false</GenerateErrorForMissingTargetingPacks>
@@ -21,7 +20,6 @@
     <Reference Include="Microsoft.EntityFrameworkCore.Relational" />
     <Reference Include="Microsoft.EntityFrameworkCore.SQLite" />
     <Reference Include="Microsoft.Extensions.Hosting" />
-
   </ItemGroup>
 
   <ItemGroup>

src/DataProtection/DataProtection/src/Microsoft.AspNetCore.DataProtection.csproj

@@ -29,11 +29,11 @@
     <Reference Include="System.Security.Cryptography.Xml" />
   </ItemGroup>
 
-  <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
+  <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0' OR '$(MSBuildRestoreSessionId)' == ''">
     <Reference Include="System.Security.Principal.Windows" />
   </ItemGroup>
 
-  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetFxTargetFramework)'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetFxTargetFramework)' OR '$(MSBuildRestoreSessionId)' == ''">
     <Reference Include="System.Runtime.InteropServices.RuntimeInformation" />
   </ItemGroup>
 

src/DataProtection/EntityFrameworkCore/test/Microsoft.AspNetCore.DataProtection.EntityFrameworkCore.Test.csproj

@@ -7,8 +7,6 @@
   <ItemGroup>
     <Reference Include="Microsoft.AspNetCore.DataProtection.EntityFrameworkCore" />
     <Reference Include="Microsoft.EntityFrameworkCore.InMemory" />
-    <!-- Avoid CS1705 errors due to mix of assemblies brought in transitively. -->
-    <Reference Include="Microsoft.AspNetCore.DataProtection" />
   </ItemGroup>
 
 </Project>

src/DataProtection/StackExchangeRedis/test/Microsoft.AspNetCore.DataProtection.StackExchangeRedis.Tests.csproj

@@ -16,8 +16,6 @@
     <Reference Include="Microsoft.Extensions.Configuration.Json" />
     <Reference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" />
     <Reference Include="Microsoft.Extensions.DependencyInjection" />
-    <!-- Avoid CS1705 errors due to mix of assemblies brought in transitively. -->
-    <Reference Include="Microsoft.AspNetCore.DataProtection" />
   </ItemGroup>
 
 </Project>

src/DataProtection/samples/EntityFrameworkCoreSample/EntityFrameworkCoreSample.csproj

@@ -11,8 +11,6 @@
     <Reference Include="Microsoft.EntityFrameworkCore.SqlServer" />
     <Reference Include="Microsoft.Extensions.DependencyInjection" />
     <Reference Include="Microsoft.Extensions.Logging.Console" />
-    <!-- Avoid CS1705 errors due to mix of assemblies brought in transitively. -->
-    <Reference Include="Microsoft.Extensions.DependencyInjection.Abstractions" />
   </ItemGroup>
 
 </Project>

src/DataProtection/samples/Redis/Redis.csproj

@@ -10,8 +10,6 @@
     <Reference Include="Microsoft.Extensions.DependencyInjection" />
     <Reference Include="Microsoft.Extensions.Logging" />
     <Reference Include="Microsoft.Extensions.Logging.Console" />
-    <!-- Avoid CS1705 errors due to mix of assemblies brought in transitively. -->
-    <Reference Include="Microsoft.AspNetCore.DataProtection" />
   </ItemGroup>
 
 </Project>

src/Identity/ApiAuthorization.IdentityServer/samples/ApiAuthSample/ApiAuthSample.csproj

@@ -35,8 +35,6 @@
     <Reference Include="Microsoft.Extensions.Logging.Configuration" />
     <Reference Include="Microsoft.Extensions.Logging.Console" />
     <Reference Include="Microsoft.Extensions.Logging.Debug" />
-    <!-- Avoid CS1705 errors due to mix of assemblies brought in transitively. -->
-    <Reference Include="Microsoft.Extensions.DependencyInjection.Abstractions" />
   </ItemGroup>
 
 </Project>

src/Identity/EntityFrameworkCore/test/EF.InMemory.Test/Microsoft.AspNetCore.Identity.EntityFrameworkCore.InMemory.Test.csproj

@@ -15,8 +15,6 @@
     <Reference Include="Microsoft.AspNetCore.Hosting" />
     <Reference Include="Microsoft.AspNetCore.Http" />
     <Reference Include="Microsoft.EntityFrameworkCore.Sqlite" />
-    <!-- Avoid CS1705 errors due to mix of assemblies brought in transitively. -->
-    <Reference Include="Microsoft.Extensions.DependencyInjection.Abstractions" />
   </ItemGroup>
 
 </Project>

src/Identity/EntityFrameworkCore/test/EF.Test/Microsoft.AspNetCore.Identity.EntityFrameworkCore.Test.csproj

@@ -20,8 +20,6 @@
     <Reference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" />
     <Reference Include="Microsoft.Extensions.Configuration.FileExtensions" />
     <Reference Include="Microsoft.Extensions.Configuration.Json" />
-    <!-- Avoid CS1705 errors due to mix of assemblies brought in transitively. -->
-    <Reference Include="Microsoft.Extensions.DependencyInjection.Abstractions" />
   </ItemGroup>
 
 </Project>

src/Identity/Extensions.Core/src/Microsoft.Extensions.Identity.Core.csproj

@@ -16,7 +16,8 @@
     <Reference Include="Microsoft.Extensions.Options" />
   </ItemGroup>
 
-  <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0' OR '$(TargetFramework)' == '$(DefaultNetFxTargetFramework)'">
+  <ItemGroup
+      Condition="'$(TargetFramework)' == 'netstandard2.0' OR '$(TargetFramework)' == '$(DefaultNetFxTargetFramework)' OR '$(MSBuildRestoreSessionId)' == ''">
     <Reference Include="System.ComponentModel.Annotations" />
   </ItemGroup>
 

src/Identity/samples/IdentitySample.DefaultUI/IdentitySample.DefaultUI.csproj

@@ -31,8 +31,6 @@
     <Reference Include="Microsoft.Extensions.Hosting" />
     <Reference Include="Microsoft.Extensions.Logging.Console" />
     <Reference Include="Microsoft.Extensions.Logging.Debug" />
-    <!-- Avoid CS1705 errors due to mix of assemblies brought in transitively. -->
-    <Reference Include="Microsoft.Extensions.DependencyInjection.Abstractions" />
   </ItemGroup>
 
   <ItemGroup>

src/Identity/samples/IdentitySample.Mvc/IdentitySample.Mvc.csproj

@@ -27,7 +27,5 @@
     <Reference Include="Microsoft.Extensions.Configuration.UserSecrets" />
     <Reference Include="Microsoft.Extensions.Logging.Console" />
     <Reference Include="Microsoft.Extensions.Logging.Debug" />
-    <!-- Avoid CS1705 errors due to mix of assemblies brought in transitively. -->
-    <Reference Include="Microsoft.Extensions.DependencyInjection.Abstractions" />
   </ItemGroup>
 </Project>

src/Identity/testassets/Identity.DefaultUI.WebSite/Identity.DefaultUI.WebSite.csproj

@@ -42,8 +42,6 @@
     <Reference Include="Microsoft.Extensions.Logging.Configuration" />
     <Reference Include="Microsoft.Extensions.Logging.Console" />
     <Reference Include="Microsoft.Extensions.Logging.Debug" />
-    <!-- Avoid CS1705 errors due to mix of assemblies brought in transitively. -->
-    <Reference Include="Microsoft.Extensions.DependencyInjection.Abstractions" />
   </ItemGroup>
 
   <PropertyGroup>

src/JSInterop/Microsoft.JSInterop/src/Microsoft.JSInterop.csproj

@@ -9,7 +9,7 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
-  <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
+  <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0' OR '$(MSBuildRestoreSessionId)' == ''">
     <Reference Include="System.Text.Json" />
   </ItemGroup>
 

src/Logging.AzureAppServices/src/Microsoft.Extensions.Logging.AzureAppServices.csproj

@@ -20,7 +20,7 @@
     <Reference Include="System.ValueTuple" />
   </ItemGroup>
 
-  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetFxTargetFramework)'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetFxTargetFramework)' OR '$(MSBuildRestoreSessionId)' == ''">
     <Reference Include="System.Net.Http" />
   </ItemGroup>
 

src/Middleware/Diagnostics.EntityFrameworkCore/test/FunctionalTests/Diagnostics.EFCore.FunctionalTests.csproj

@@ -10,9 +10,6 @@
     <Reference Include="Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore" />
     <Reference Include="Microsoft.AspNetCore.TestHost" />
     <Reference Include="Microsoft.EntityFrameworkCore.Sqlite" />
-    <!-- Avoid CS1705 errors due to mix of assemblies brought in transitively. -->
-    <Reference Include="Microsoft.Extensions.DependencyInjection.Abstractions" />
-    <Reference Include="Microsoft.Extensions.Logging.Abstractions" />
   </ItemGroup>
 
 </Project>

src/Middleware/Diagnostics.EntityFrameworkCore/test/UnitTests/Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.Tests.csproj

@@ -7,8 +7,6 @@
   <ItemGroup>
     <Reference Include="Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore" />
     <Reference Include="Microsoft.EntityFrameworkCore.InMemory" />
-    <!-- Avoid CS1705 errors due to mix of assemblies brought in transitively. -->
-    <Reference Include="Microsoft.Extensions.DependencyInjection.Abstractions" />
   </ItemGroup>
 
 

src/Middleware/Diagnostics/test/testassets/DatabaseErrorPageSample/DatabaseErrorPageSample.csproj

@@ -13,8 +13,6 @@
     <Reference Include="Microsoft.AspNetCore.Server.IISIntegration" />
     <Reference Include="Microsoft.AspNetCore.Server.Kestrel" />
     <Reference Include="Microsoft.EntityFrameworkCore.Sqlite" />
-    <!-- Avoid CS1705 errors due to mix of assemblies brought in transitively. -->
-    <Reference Include="Microsoft.Extensions.DependencyInjection.Abstractions" />
   </ItemGroup>
 
 </Project>

src/Middleware/HealthChecks.EntityFrameworkCore/test/Microsoft.Extensions.Diagnostics.HealthChecks.EntityFrameworkCore.Tests.csproj

@@ -9,10 +9,6 @@
     <Reference Include="Microsoft.EntityFrameworkCore.InMemory" />
     <Reference Include="Microsoft.Extensions.DependencyInjection" />
     <Reference Include="Microsoft.Extensions.Diagnostics.HealthChecks.EntityFrameworkCore" />
-    <!-- Avoid CS1705 errors due to mix of assemblies brought in transitively. -->
-    <Reference Include="Microsoft.Extensions.DependencyInjection.Abstractions" />
-    <Reference Include="Microsoft.Extensions.Diagnostics.HealthChecks" />
-    <Reference Include="Microsoft.Extensions.Diagnostics.HealthChecks.Abstractions" />
   </ItemGroup>
 
 </Project>

src/Middleware/HealthChecks/test/testassets/HealthChecksSample/HealthChecksSample.csproj

@@ -15,10 +15,6 @@
     <Reference Include="Microsoft.Extensions.Diagnostics.HealthChecks.EntityFrameworkCore" />
     <Reference Include="Microsoft.Extensions.Logging.Console" />
     <Reference Include="Newtonsoft.Json" />
-    <!-- Avoid CS1705 errors due to mix of assemblies brought in transitively. -->
-    <Reference Include="Microsoft.Extensions.DependencyInjection.Abstractions" />
-    <Reference Include="Microsoft.Extensions.Diagnostics.HealthChecks" />
-    <Reference Include="Microsoft.Extensions.Diagnostics.HealthChecks.Abstractions" />
   </ItemGroup>
 
 </Project>

src/Razor/Microsoft.NET.Sdk.Razor/src/Microsoft.NET.Sdk.Razor.csproj

@@ -23,7 +23,7 @@
   <ItemGroup>
     <Reference Include="Microsoft.Build.Framework" />
     <Reference Include="Microsoft.Build.Utilities.Core" />
-    <Reference Include="System.Reflection.Metadata"  Condition="'$(TargetFramework)'=='net46'" />
+    <Reference Include="System.Reflection.Metadata" Condition="'$(TargetFramework)'=='net46' OR '$(MSBuildRestoreSessionId)' == ''" />
 
     <Reference Include="rzc"
       Targets="Publish"

src/Security/samples/Identity.ExternalClaims/Identity.ExternalClaims.csproj

@@ -26,7 +26,5 @@
     <Reference Include="Microsoft.Extensions.Configuration.UserSecrets" />
     <Reference Include="Microsoft.Extensions.Logging.Console" />
     <Reference Include="Microsoft.Extensions.Logging.Debug" />
-    <!-- Avoid CS1705 errors due to mix of assemblies brought in transitively. -->
-    <Reference Include="Microsoft.Extensions.DependencyInjection.Abstractions" />
   </ItemGroup>
 </Project>

src/Servers/Connections.Abstractions/src/Microsoft.AspNetCore.Connections.Abstractions.csproj

@@ -19,7 +19,10 @@
     <Compile Include="$(SharedSourceRoot)CodeAnalysis\*.cs" />
   </ItemGroup>
 
-  <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0' OR '$(TargetFramework)' == '$(DefaultNetFxTargetFramework)'">
+  <!-- Special case building from source because Microsoft.Bcl.AsyncInterfaces isn't available for source builds. -->
+  <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.0' OR
+      '$(TargetFramework)' == '$(DefaultNetFxTargetFramework)' OR
+      ('$(MSBuildRestoreSessionId)' == '' AND '$(DotNetBuildFromSource)' != 'true') ">
     <Reference Include="Microsoft.Bcl.AsyncInterfaces" />
   </ItemGroup>
 

src/SignalR/clients/csharp/Http.Connections.Client/src/Microsoft.AspNetCore.Http.Connections.Client.csproj

@@ -20,7 +20,7 @@
     <Reference Include="Microsoft.Extensions.Options" />
   </ItemGroup>
 
-  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetFxTargetFramework)'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetFxTargetFramework)' OR '$(MSBuildRestoreSessionId)' == ''">
     <Reference Include="System.Net.Http" />
     <Reference Include="System.Runtime.InteropServices.RuntimeInformation" />
   </ItemGroup>

src/SignalR/clients/ts/FunctionalTests/SignalR.Client.FunctionalTestApp.csproj

@@ -36,8 +36,6 @@
     <Reference Include="Microsoft.Extensions.Logging.Debug" />
     <Reference Include="Newtonsoft.Json" />
     <Reference Include="System.Reactive.Linq" />
-    <!-- Avoid CS1705 errors due to mix of assemblies brought in transitively. -->
-    <Reference Include="Microsoft.AspNetCore.SignalR.Common" />
   </ItemGroup>
 
   <ItemGroup>

src/SignalR/common/Http.Connections.Common/src/Microsoft.AspNetCore.Http.Connections.Common.csproj

@@ -20,7 +20,8 @@
     <Reference Include="Microsoft.AspNetCore.Connections.Abstractions" />
   </ItemGroup>
 
-  <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0' OR '$(TargetFramework)' == '$(DefaultNetFxTargetFramework)'">
+  <ItemGroup
+      Condition="'$(TargetFramework)' == 'netstandard2.0' OR '$(TargetFramework)' == '$(DefaultNetFxTargetFramework)' OR '$(MSBuildRestoreSessionId)' == ''">
     <Reference Include="System.Text.Json" />
   </ItemGroup>
 

src/SignalR/common/SignalR.Common/src/Microsoft.AspNetCore.SignalR.Common.csproj

@@ -26,11 +26,12 @@
     <Reference Include="Microsoft.Extensions.Options" />
   </ItemGroup>
 
-  <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0' OR '$(TargetFramework)' == '$(DefaultNetFxTargetFramework)'">
+  <ItemGroup
+       Condition="'$(TargetFramework)' == 'netstandard2.0' OR '$(TargetFramework)' == '$(DefaultNetFxTargetFramework)' OR '$(MSBuildRestoreSessionId)' == ''">
     <Reference Include="System.Text.Json" />
   </ItemGroup>
 
-  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetFxTargetFramework)'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetFxTargetFramework)' OR '$(MSBuildRestoreSessionId)' == ''">
     <Reference Include="System.Net.Sockets" />
   </ItemGroup>
 

src/SignalR/common/testassets/Tests.Utils/Microsoft.AspNetCore.SignalR.Tests.Utils.csproj

@@ -19,8 +19,6 @@
     <Reference Include="Microsoft.AspNetCore.SignalR.Protocols.MessagePack" />
     <Reference Include="Microsoft.AspNetCore.SignalR.Protocols.NewtonsoftJson" />
     <Reference Include="Microsoft.AspNetCore.Testing" />
-    <!-- Avoid CS1705 errors due to mix of assemblies brought in transitively. -->
-    <Reference Include="Microsoft.AspNetCore.SignalR.Common" />
 
     <Compile Include="$(SharedSourceRoot)ValueStopwatch\*.cs" />
   </ItemGroup>

src/SignalR/samples/ClientSample/ClientSample.csproj

@@ -14,8 +14,6 @@
     <Reference Include="Microsoft.AspNetCore.SignalR.Client" />
     <Reference Include="Microsoft.Extensions.Logging.Console" />
     <Reference Include="Microsoft.Extensions.Logging" />
-    <!-- Avoid CS1705 errors due to mix of assemblies brought in transitively. -->
-    <Reference Include="Microsoft.AspNetCore.SignalR.Common" />
   </ItemGroup>
 
 </Project>

src/SignalR/samples/JwtClientSample/JwtClientSample.csproj

@@ -7,8 +7,6 @@
 
   <ItemGroup>
     <Reference Include="Microsoft.AspNetCore.SignalR.Client" />
-    <!-- Avoid CS1705 errors due to mix of assemblies brought in transitively. -->
-    <Reference Include="Microsoft.AspNetCore.SignalR.Common" />
   </ItemGroup>
 
 </Project>

src/SignalR/samples/SignalRSamples/SignalRSamples.csproj

@@ -20,8 +20,6 @@
     <Reference Include="Microsoft.Extensions.Configuration.CommandLine" />
     <Reference Include="Microsoft.Extensions.Logging.Console" />
     <Reference Include="System.Reactive.Linq" />
-    <!-- Avoid CS1705 errors due to mix of assemblies brought in transitively. -->
-    <Reference Include="Microsoft.AspNetCore.SignalR.Common" />
   </ItemGroup>
 
   <Target Name="CopyTSClient" BeforeTargets="AfterBuild">

src/SignalR/server/Specification.Tests/src/Microsoft.AspNetCore.SignalR.Specification.Tests.csproj

@@ -22,8 +22,6 @@
     <Reference Include="Microsoft.AspNetCore.SignalR.Protocols.NewtonsoftJson" />
     <Reference Include="xunit.assert" />
     <Reference Include="xunit.extensibility.core" />
-    <!-- Avoid CS1705 errors due to mix of assemblies brought in transitively. -->
-    <Reference Include="Microsoft.AspNetCore.SignalR.Common" />
   </ItemGroup>
 
 </Project>

src/Testing/src/Microsoft.AspNetCore.Testing.csproj

@@ -39,7 +39,7 @@
     <Reference Include="xunit.extensibility.execution" />
   </ItemGroup>
 
-  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetFxTargetFramework)'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetFxTargetFramework)' OR '$(MSBuildRestoreSessionId)' == ''">
     <Reference Include="System.Net.Http" />
     <Reference Include="System.Runtime.InteropServices.RuntimeInformation" />
   </ItemGroup>

src/Testing/test/Microsoft.AspNetCore.Testing.Tests.csproj

@@ -17,7 +17,7 @@
     <Reference Include="System.Runtime.InteropServices.RuntimeInformation" />
   </ItemGroup>
 
-  <ItemGroup Condition="'$(TargetFramework)' == 'net472'">
+  <ItemGroup Condition="'$(TargetFramework)' == 'net472' OR '$(MSBuildRestoreSessionId)' == ''">
     <Reference Include="System.Net.Http" />
   </ItemGroup>
 </Project>

src/WebEncoders/src/Microsoft.Extensions.WebEncoders.csproj

@@ -16,7 +16,8 @@
     <Reference Include="Microsoft.Extensions.Options" />
   </ItemGroup>
 
-  <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0' OR '$(TargetFramework)' == '$(DefaultNetFxTargetFramework)'">
+  <ItemGroup
+      Condition="'$(TargetFramework)' == 'netstandard2.0' OR '$(TargetFramework)' == '$(DefaultNetFxTargetFramework)' OR '$(MSBuildRestoreSessionId)' == ''">
     <Reference Include="System.Text.Encodings.Web" />
   </ItemGroup>