One way of setting up CC.NET and VSS is that CC.NET is responsible for getting the latest version (setting the attribute autoGetSource to true of the sourcecontrol node in the ccnet.config file) or NAnt by using the vssget task of NAntContrib for compiling the sources by NAnt. I always use the csc task instead of the solution task, therefore it is necessary to have a clean version of VSS, because VSS does not automatically delete files locally that have been deleted in the VSS database.

An alternative and better way is to set a shadow folder in VSS. A shadow folder contains a copy of the most recently checked-in version of each file in the project. This is exactly what we need for compiling the sources.

That way is CC.NET only using VSS for monitoring changes in the VSS database and/or labeling.