I'm working on a vb.net project for editing an adt *.apj. Its an xml doc. The problem I'm having is that while you have the project selected as the active project in adt, the adt process keeps the file open. Thus, my app can't save to it. However, somehow adt is able to do it when multiple users are working on the project. How does adt avoid collisions while it has the file open, i.e. how can all the users have the file open at once?