Compile two versions of C # program automatically

I need to make the same program for two different companies (different logo, different name). I would like it to be done automatically when I do a release.

I'm going to use a resource file or satellite assembly, but I'm not sure how to do this.

Which one do you think is the best?

Thank.

EDIT:

• Differences are only one image and one line.
• I would like everything generated with one click.
• We can get more customers in the future.
• I should also add that I am using SmartAssembly to merge all my dependencies into a single exe file.