Managing complex Web.Config files between deployment environments

Question

Does anyone know of any good tools/utilities for managing Web.Config files between different build/deployment environments?

For example, I have a WCF pr

Answer 1

We use tags in our config files, that are replaced at build time to reflect the intended deployment environment. I've been inspired by Lavablast blog

It's nice to have only one template config file to manage.

The drawback is that you can't easily have custom "sections".