I tried it, and the moment it started I could guess that it was a .NET app because of the way the window was drawn.

Fortunately .NET 2.0 is much faster. After playing around with VS2k5 and WinForms, I'm impressed by the improvements. I'd say that with 2.0 we've (finally!) reached the point where most .NET apps "feel" like a "real" Win32 app, not an old  Java app.