> We are using VFP as a front end for our applications. But now i want to try some other frontend. Can any one suggest me how is C#?

That depends on where you're coming from. If you've got a background in C++, C# will be easy to learn. I would imagine coming from a VFP or VB background might make it a bit tougher, but certainly not insurmountable.

> Where can i get information about it (Exact URL).

Click here for information and pointers to more information from the C# test lead.

> Can normal applications be done on C# as fast as VFP?

It's hard for me to say, since I don't know C# and the .Net architecture as well as I know VFP. So the learning curve gets in the way of any valid comparison. Depending on the app, you whip stuff out in C# pretty fast in comparison to using unmanaged C++.