I had developed a three tier solution previously in VS2008 about a couple of years ago.
Now I want to migrate it to 4.0. Since I have had absolutely no touch in .NET for the past two years , I'm kinda skeptical.
Will you please tell me or help me find links for
1) Three tier architecture.
2) How to migrate a current solution to 4.0.
Any help will be greatly appreciated :)