What's it Written In?

One question we've been asked by a surprisingly large amount of our customers (Chimney Sweeps) is "What is this written in?". When I say, well "C# and Visual Basic .NET", they wonder if that is like Access. A surpringly large amount of sweeps have tried to write something similar in Access. One guy wrote one for DOS way back. I think that gives you a good idea about the Do-It-Yourself attitude Chimney Sweeps have. I've never been asked this question so often in other projects. Anyone else get this much?