I would like to add more app.configs other than just the debug and release. Is this possible?
You need to create a solution configuration for each app.*.config file and then rerun the transform.
- In Visual Studio go to the Build menu > Configuration Manager
- Beneath Active solution configuration select <New...>
- Enter a name. This will be the name in app.NAME.config.
- Click OK and return to Solution Explorer.
- Right-click app-config and select Add Transform. The new app.NAME.config will appear.