Plugin Language Choices

I've seen some conflicting answers to this question across the various sources (wiki, forums, etc.), so I figured I'd ask here:

What are the language choices for creating a CLR-compatible (Mono) plugin library?

In one post someone indicated that you can only use C++ for native plugins, and not for a CLR plugin.

Most of these should work: http://en.wikipedia.org/wiki/List_of_CLI_languages

As long as it's CLI compatible, and you can compile it to .NET ~2.0, it should be ok

This includes C++ (As well as being able to use it for native plugins)