CopyLocal = True for GAC assemblies

How does CopyLocal = True work for assemblies registered in GAC? What if two GAC-assemblies with the 开发者_Go百科same name are referenced to a project?

Referencing two assemblies with the same name already has lots of problems; some with workarounds (extern alias), some not. You're best avoiding this by a long distance.

Re choosing to copy-local; that is handy if you have it in the GAC, but the target machine might not; for example, you can deploy MVC-3 using copy-local without installing anything on the servers, but on a dev machine they are most likely in the GAC.