Add CommonWithMetadataImportOptions

src/Compilers/CSharp/Portable/CSharpCompilationOptions.cs

@@ -422,7 +422,7 @@ internal CSharpCompilationOptions WithDebugPlusMode(bool debugPlusMode)
             return new CSharpCompilationOptions(this) { DebugPlusMode_internal_protected_set = debugPlusMode };
         }
 
-        internal CSharpCompilationOptions WithMetadataImportOptions(MetadataImportOptions value)
+        internal new CSharpCompilationOptions WithMetadataImportOptions(MetadataImportOptions value)
         {
             if (value == this.MetadataImportOptions)
             {
@@ -520,6 +520,9 @@ public new CSharpCompilationOptions WithStrongNameProvider(StrongNameProvider pr
         protected override CompilationOptions CommonWithStrongNameProvider(StrongNameProvider provider) =>
             WithStrongNameProvider(provider);
 
+        internal override CompilationOptions CommonWithMetadataImportOptions(MetadataImportOptions value) =>
+            WithMetadataImportOptions(value);
+
         [Obsolete]
         protected override CompilationOptions CommonWithFeatures(ImmutableArray<string> features)
         {

src/Compilers/Core/Portable/Compilation/CompilationOptions.cs

@@ -502,6 +502,8 @@ public CompilationOptions WithOverflowChecks(bool checkOverflow)
             return CommonWithCheckOverflow(checkOverflow);
         }
 
+        internal CompilationOptions WithMetadataImportOptions(MetadataImportOptions value) => CommonWithMetadataImportOptions(value);
+
         protected abstract CompilationOptions CommonWithConcurrentBuild(bool concurrent);
         protected abstract CompilationOptions CommonWithDeterministic(bool deterministic);
         protected abstract CompilationOptions CommonWithOutputKind(OutputKind kind);
@@ -525,6 +527,7 @@ public CompilationOptions WithOverflowChecks(bool checkOverflow)
         protected abstract CompilationOptions CommonWithCryptoPublicKey(ImmutableArray<byte> cryptoPublicKey);
         protected abstract CompilationOptions CommonWithDelaySign(bool? delaySign);
         protected abstract CompilationOptions CommonWithCheckOverflow(bool checkOverflow);
+        internal abstract CompilationOptions CommonWithMetadataImportOptions(MetadataImportOptions value);
 
         [Obsolete]
         protected abstract CompilationOptions CommonWithFeatures(ImmutableArray<string> features);

src/Compilers/VisualBasic/Portable/VisualBasicCompilationOptions.vb

@@ -738,6 +738,10 @@ Namespace Microsoft.CodeAnalysis.VisualBasic
             Return Me.WithReportSuppressedDiagnostics(reportSuppressedDiagnostics)
         End Function
 
+        Friend Overrides Function CommonWithMetadataImportOptions(value As MetadataImportOptions) As CompilationOptions
+            Return WithMetadataImportOptions(value)
+        End Function
+
         <Obsolete>
         Protected Overrides Function CommonWithFeatures(features As ImmutableArray(Of String)) As CompilationOptions
             Throw New NotImplementedException()
@@ -807,7 +811,7 @@ Namespace Microsoft.CodeAnalysis.VisualBasic
             Return New VisualBasicCompilationOptions(Me) With {.OptimizationLevel = value}
         End Function
 
-        Friend Function WithMetadataImportOptions(value As MetadataImportOptions) As VisualBasicCompilationOptions
+        Friend Shadows Function WithMetadataImportOptions(value As MetadataImportOptions) As VisualBasicCompilationOptions
             If value = Me.MetadataImportOptions Then
                 Return Me
             End If