>I see this is an ASP.NET application. I thought it was Windows. I don't think you have that option in ASP.NET, but I don't have a project handy to test.

This is very annoying. There is no way to get rid of this mess. These folders are still in the solution explorer and I don't see a way to get rid of them through the interface.

UPDATE. Looks like I was in debug mode. Once I stopped it I was able to delete these folders.