That's assuming that in 5 years from now Windows is going to be the popular UI platform. If much of the program is not about the UI, then C is a good choice, s

That's assuming that in 5 years from now Windows is going to be the popular UI platform. If much of the program is not about the UI, then C is a good choice, since whatever finger nail mounted laser projection display computer will become popular in the future, you'll have ANSI C projects ported to it quickly. C#, I'm not so sure.