How do you manage .NET app.config files for large applications?

Question

Suppose a large composite application built on several foundation components packaged in their own assemblies: (database reading, protocol handlers, etc.). For some deploy

Answer 1

We created an AssemblySettingsConfig class that acts like ConfigurationManager, but loads a .config for each individual assembly. So the application has a .config, and any DLLs it references have their own .config files. Has worked out well so far.