How to prevent new subdirectories from becoming under source control?

[andreir23]

I have a web application in ASP.NET 2.0 which has an App_Data folder. When running my application will create subfolders in this folder (like 13,49,55) where it spits some XML files.

I don't want any subfolder nor files in these dynamically created folders to go into Visual Source Safe but when I verify which files are checked-out these appear as "newly created".

How can I prevent this? These files and subfolders are not to be in the source safe.

PS: I did search first before opening this thread.

Thanks!
Andrei.