I try to add a new file to my source controlled VS2012 solution and receive this message:
A file or folder with the name \'xxx\' already exists. Pleas
If you're using MVC, and trying to create a new Controller, you should also check the Views and Models. Even though there was no folder or file with the Controller name, I had to delete a View folder with the same name (that already existed for some reason) using Show All Files
and rebuild the solution.