A friend and I are working on a VS 2010 solution together. He makes changes emails it to me, and vice versa. I have ReSharper and he doesnt. I've noticed that a new folder got added with _ReSharper got added to the root folder. When he compiles with this new folder, he gets a whole slew of ReSharper warnings but otherwise its ok. Since he doesnt have ReSharper, can he just remove that folder from the root directory?