Where I work people do a variety of things. We mostly use VS but I like to hit F5 and have it do an incremental build and start the debugger but most everyone else builds through a command line tool they created and have a VS extension that automatically attaches to certain processes when you fire them up. It's not uncommon at all for people who are not building via visual studio to break the build for people who are not. The main checkin gate of course does it the same as the command line people so it can be very ugly when everyone is doing a variety of things. They can end up breaking your system inadvertently.