I am the author of a project with a goal of providing .NET/Mono developers with an uncommonly powerful configuration tool that makes it easy for developers to write highly configurable applications in a short amount of time. It's already used by Gnosmirc, the GNOme SMart IRc Client, an IRc program written in GTK# and Mono.

The project name is Nini and you can visit the homepage here: http://nini.sourceforge.net/