Did anyone else know VS .NET did this?
If you create a file called app.config in your VS .NET project, that app.config folder will be copied to the output folder (e.g. bin\Debug) and renamed target.config, e.g. MyApp.exe.config.
That's a great way of getting .config files into SourceSafe without having to reference the output folder, and a good way of pushing .config files around in developer teams. Its also a good way of confusing otherwise seasoned developers if they don't know it does it!