Hi Sue, App.config is exactly what it sounds like: it's an XML-based configuration file that stores information related to the current project (for example, a console or Windows Forms application).
It is the sibling to the Web Site Project configuration file Web.config, which is also XML-based. These two configuration files are quite extensible and flexible. You'll come to rely on them. They are also very strict in terms of ordering and syntax; you'll be hard-pressed to do any permanent damage (so no worries there), but they will complain very loudly to you if things aren't as expected. Luckily, the .config files are well-tread in the .NET world and ample documentation and examples exist online. My advice would be to become very acquainted with the MSDN documentation at http://msdn.microsoft.com/en-us/default.aspx as you will find 90% of your answers within, and it's easy to switch versions (there is documentation for version 2.0 versus 3.0 versus 3.5 for most topics). Hope that helps! Alan http://www.twitter.com/anachronistic
