@Guy
But application config isn't always just key/value pairs. Look at something like the tomcat configuration for what ports it listens on. Here's an example:
You can have any number of connectors. Define more in the file and more connectors exist. Don't define any more and no more exist. There's no good way (imho) to do that with plain old key/value pairs.
If your app's config is simple, then something simple like an INI file that's read into a dictionary is probably fine. But for something more complex like server configuration, an INI file would be a huge pain to maintain, and something more structural like XML or YAML would be better. It all depends on the problem set.
