Where is Visual-D C# code?

[Ramon via Digitalmars-d-ide]

I use Visual-D for Visual Studio daily for writing D programs. 
Also I am very experienced in writing Visual Studio extensions, I 
wrote this commercial one: http://misoftware.rs/OmniCode.

Now, looking at Visual-D source code, 85% is D code. Well, at 
first it seems OK to write a D extension for D in D, but I 
wonder, how do you manage to use all .NET APIs from D?

Because for implementing every aspect of a language extension in 
Visual Studio (Intellisense, outlining, QuickInfo, signature 
help, snippets), in my experience, you really need to work with 
the .NET assemblys of the Visual Studio Extensibility SDK. I 
guess you are doing it in a old COM way, which I think is still 
supported by VS. But I think that is far from being productive. 
Also I doubt you can support every new aspect of VS editor 
experience, because since VS 2010 I think, the editor is based on 
WPF, so it is .NET in all its glory.

I am just worried if Visual-D is taking the right approach for 
implementing stuff. I could definitely help in the C# area.