wow that sounds really arrogant.
Skills shouldn't be rated by the IDE developer use.
Not everbody wants to be that kind of geek, that's hacking into a console all day long, rather than using an good IDE.
Rate people by their abilitity to handle those programming languages (e.g. readability, cleanness, layout, speed and so on).
If you don't need C# developers fine, but don't say people should be aware of C# programmers.
By the way, I worked with really good developers, which also programmed in C#, many of them were real experts and absolutly passionated.