I created a UserControl in a .Net 4.0 application, and now I need this UserControl in another application that is in a .Net 2.0 environment. Can I use my UserControl in a .Net 2.0 (VS 2005) application?
One of them is not just using .NET 4 in an older environment.
No, but vice versa .net2 → .net4 works
If you do not use any of the functions above .net2, you can recompile with net2.0 as the target platform.