I got a sourcecode for a program since way back maybe since 05 or something, now im trying to compile this program and the following happens.

"Warning CS1595: 'Program_Name' is defined in multiple places using definition from Program_Name.cs"

I'm trying to compile with the csc from net framework 1.1.4322 since this was the current framework when the program was written.

How do i get this compiled ?