I don't think we are supposed to either, but it's never been an issue for our company because there's always shelvesets with TFS, so you can shelve your work at

I don't think we are supposed to either, but it's never been an issue for our company because there's always shelvesets with TFS, so you can shelve your work at different stages and retrieve it later. If you're using a DVCS like git, though, that seems silly.