Could you use a Free IDE for C# and VB.NET? I sure could. I may be doing some work in VB.NET soon, and I don't have money to spend on the MS IDE, even if I wanted to support them. #develop (pronouced sharpdevelop) is GPL and looks pretty good from the screenshot. I'll know more when I've downloaded it, but it looks promising already.

Heres your link:
SharpDevelop @ic#code