C# application doesn't run on another computer

Question

I complied my C# windows forms application on Visual Studio 2008 with configuration "Release". When I try to run it on another computer, no windows are shown at all. Complied on Windows 7, another computer has windows xp installed. What can it be?

Added: I didn't create any installer. Another machine has .net framework 3.0, not 3.5 installed, but simple hello world application works just fine. I tried to copy the program to another folder on my computer - no changes.

Answer 1

Create a setup program instead of simply copying the files. This will help determine if you are missing anything such as .net fw 3.5.

Answer 2

You said:

Another machine has .net framework 3.0, not 3.5 installed

If you configured your project to run with .NET 3.5 then you MUST install it on the other machine.