Migrant from VS 2003 .Net1.1 to VS 2008 .Net 2.0

I converted my app that was implemented开发者_C百科 in VS 2003 to .net 2.0 VS 2008 afterward my app became slow about 4 times than previous version!

is it normal or not ? Best regards

No. I have never heard of such a performance degradation before from upgrading the target framework.

.NET 2.0 uses another version of the CLR than 1.1, so there might be small differences. Perhaps you are running into some edge case, but we really can't tell without any more information.