, pnunberg wrote

@pnunberg:Sorry for my ignorance, but this is a compilation error, How is it possible that a compilation makes use of two different threads?

sorry I mis read part of the message....

but the core error is still that two things are pointed at one file.

Error    1    two file output names have been resolved to the same output path: "obj\Release\EO.NewForm1.resources"    

that file that has form resources is refered to by two forms or by two things the compiler is checking.

normally one Form in .net has one resource file.

possibly a form was copied and did not get a different resource file name?