>Right I agree, the right tool for the right job. If you don't know C#, do it in VB.NET. But why do the use C# to do low level stuff, and have to write VB.NET for the UI. I think if you are doing anything custom, any type of complex project then you would just naturally use C#.


I agree. What I meant was that you could but that doesn't mean you should. One reason I can think of is 2 different group of programmers working on the frontend and backend. They might even be located in 2 different countries.