Set ShouldUnsetParentConfigurationAndPlatform to false in MSBuildWorkspace

src/Workspaces/Core/MSBuild/MSBuild/Build/ProjectBuildManager.cs

@@ -39,7 +39,13 @@ internal class ProjectBuildManager
             // don't actually run the compiler
             { PropertyNames.SkipCompilerExecution, bool.TrueString },
 
-            { PropertyNames.ContinueOnError, PropertyValues.ErrorAndContinue }
+            { PropertyNames.ContinueOnError, PropertyValues.ErrorAndContinue },
+
+            // this ensures that the parent project's configuration and platform will be used for
+            // referenced projects. So, setting Configuration=Release will also cause any project
+            // references to also be built with Configuration=Release. This is necessary for getting
+            // the correct output path from project references.
+            { PropertyNames.ShouldUnsetParentConfigurationAndPlatform, bool.FalseString }
         }.ToImmutableDictionary();
 
         private readonly ImmutableDictionary<string, string> _additionalGlobalProperties;

src/Workspaces/Core/MSBuild/MSBuild/Constants/PropertyNames.cs

@@ -49,6 +49,7 @@ internal static class PropertyNames
         public const string RemoveIntegerChecks = nameof(RemoveIntegerChecks);
         public const string ResolvedCodeAnalysisRuleSet = nameof(ResolvedCodeAnalysisRuleSet);
         public const string RootNamespace = nameof(RootNamespace);
+        public const string ShouldUnsetParentConfigurationAndPlatform = nameof(ShouldUnsetParentConfigurationAndPlatform);
         public const string SignAssembly = nameof(SignAssembly);
         public const string SkipCompilerExecution = nameof(SkipCompilerExecution);
         public const string StartupObject = nameof(StartupObject);

src/Workspaces/MSBuildTest/NetCoreTests.cs

@@ -369,7 +369,7 @@ public async Task TestOpenSolution_NetCoreMultiTFMWithProjectReferenceToFSharp()
         [ConditionalFact(typeof(VisualStudioMSBuildInstalled), typeof(DotNetCoreSdk.IsAvailable))]
         [Trait(Traits.Feature, Traits.Features.MSBuildWorkspace)]
         [Trait(Traits.Feature, Traits.Features.NetCore)]
-        public async Task TestOpenSolution_ReferenceConfigurationSpecificMetadata()
+        public async Task TestOpenProject_ReferenceConfigurationSpecificMetadata()
         {
             var files = GetBaseFiles()
                 .WithFile(@"Solution.sln", Resources.SolutionFiles.Issue30174_Solution)