Today I was updating an old .net site to use the new .net2 classes. The warning messages in the C# Express IDE about obsolete classes where quite helpful but after a bit of googling I came across the following link. Its really handy for identifying areas in your applications that need special attention. I just scanned the list and located 5 classes that I’m positive I used in the original application.
.NET Framework V2.0 Obsolete API List