>>15
I have worked on a number of places, and they normally ask you ample knowledge of it. Or Visual Basic. Yeah yeah M$ blah blah.
Learn C# if you want to eat. Learn C++ and C if you want.
Though learning C means that you won't have problems with C++ or C#.
Companies love their MS programs. And ASP. Do learn it for your own sake. Learn anything else if you want to do anything else.