>For a start, I was already considering a plain text file (and I assume the configuration settings are more appropriate for this purpose); but does .NET use the concept of a "default directory"? That is, can I specify a filename without the full path?
>
>Or should I store configuration files in some special .NET directory?

The configuration file lives in the same folder as the executable and takes its name (i.e. myapp.exe.config).

The only downside is that the framework doesn't provide a mechanism to write back to the file (which I find stupid, to say the least). Rick Strahl has a class that takes care of this in his web site, though.

I use a configuration file in an app that I'm working on, but I still like ini files much better (they're easier to look at, imo).

Alex