Cannot get internal members of a Type from within INamedTypeSymbol

Question

I am getting a referenced type from a Roslyn compilation by using Compilation.GetTypeByMetadataName(...) method. Then I use INamedTypeSymbol.GetMembers() method to get all its member symbols. I am getting all public and protected symbols but neither private nor internal. I do not care much about private member symbols, but internals are a must for me. Is there any way to get them from a Roslyn compilation?

score 1 · Answer 1 · answered Jan 24 '18 at 12:55

It seems like I resolved the problem but not without a hack.

one has to set a hidden property MetadataImportOptions of the compilation to MetadataImportOptions.All (which is 2). Both the CSharpCompilationOptions.MetadataImportOptions member and MetadataImportOptions enumeration are internal to Microsort.CodeAnalysis assembly. I had to use reflection to be able to set it. In particular I did something like:

    MethodInfo withMetadataImportOptionsMethodInfo = 
      typeof(CSharpCompilationOptions).GetMethod("WithMetadataImportOptions, BindingFlags.NonPublic | BindingFlags.Instance);

    MyCompilationOptions = 
        (CSharpCompilationOptions) withMetadataImportOptionsMethodInfo.Invoke(MyCompilationOptions, (byte) 2);

(byte) 2 is the MetadataImportOptions.All option.

Cannot get internal members of a Type from within INamedTypeSymbol

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