When you use Visual Web Developer to retrieve a copy of the solution from source control for the first time, Visual Web Developer creates the correct structure on your computer.
If you enlist in a solution that contains a Microsoft Internet Information Services (IIS) Web site that does not already exist on the local computer, Visual Web Developer creates the Web site beside the solution structure and points your virtual directory to that location.
If you enlist in a solution that contains an IIS Web site, and the virtual directory for the Web site already exists on your local computer, Visual Web Developer displays a dialog box asking if you want to add the files from source control to the existing Web site instead of creating a new folder. If you click Yes, Visual Web Developer uses the existing location. If you click No, Visual Web Developer creates a new folder with an underscore and a 1 (_1) appended to the name.