Is it possible to have two app.config files where one app.config serves as a container for second (nested) app.config file? I would like to reference specific sections of a
You can reference other config files yes, so you can have static stuff in one file, and machine specific stuff in another.
Eg, to put app settings in a seperate file, in a subfolder called "configuration":
Then in the AppSettings.config, just include the appSettings tag as normal: