Which application could benefit from writing in F #, the opposite of more conventional languages?

Question

Possible duplicates:
What is used for F #? What are the benefits of using C # vs F # or F # vs C #

I recently learned C #, WPF, a bit of WCF, and now I read that Visual Studio 2010 will also support F #.

My question is: for which application might you need F # instead of C # or Visual Basic?

Is F # required to create Windows applications that can already be written using C # and WPF?

Answer 1

" F # # Visual Basic?" - . , # VB, .