Fix build

src/VisualStudio/Core/Def/Implementation/ProjectSystem/VisualStudioProject.cs

@@ -17,7 +17,7 @@ namespace Microsoft.VisualStudio.LanguageServices.Implementation.ProjectSystem
 {
     internal sealed class VisualStudioProject
     {
-        private static readonly ImmutableArray<MetadataReferenceProperties> s_defaultMetadataReferenceProperties = ImmutableArray.Create<MetadataReferenceProperties>(default);
+        private static readonly ImmutableArray<MetadataReferenceProperties> s_defaultMetadataReferenceProperties = ImmutableArray.Create(default(MetadataReferenceProperties));
 
         private readonly VisualStudioWorkspaceImpl _workspace;
         private readonly HostDiagnosticUpdateSource _hostDiagnosticUpdateSource;