The problem with these sites is that they don't always give you the "correct" way to do things. It's nice for a quick and dirty conversion but not something I would use for moving an entire project with.

Well that's not entirely what I meant. They are alot better now in terms of giving you working code. It used to be a few years ago it would give you something but it usually didn't work. Now that's not an issue but it generally goes the long way to accomplish a task that you could have done in a lot less code if you took the time to learn the framework. In most cases you are probably spending more times optimizing the code you get from that then it could have taken to do it yourself.

Also at that point there's no real point in converting if you have a working product since you aren't going to really notice a difference with program written in vb vs. a program in c#.