How do you handle multiple web.config files for multiple environments?

Question

The way I currently handle this is by having multiple config files such as:

web.config
web.Prod.config
web.QA.config
web.Dev.config

When th

Answer 1

Scott Gu had an article on this once. The solution he presented was to use a Pre-build event to copy the correct config into place depending on the build configuration chosen.

I also noticed that there already is a similar question here on SO.