.Net 1.0 code will run quite happily on the latest framework. We just pulled one of our apps up to .Net 4.0 and it took about 5 minutes. Not a small one either

.Net 1.0 code will run quite happily on the latest framework. We just pulled one of our apps up to .Net 4.0 and it took about 5 minutes. Not a small one either: 350kloc.