Keep your .config clean with external config files

The web.config (or app.config for non-web applications) file is the central place to configure your web application, starting from connection strings, over application settings to ASP.NET specific topics like caching, authentication & authorization, sessions as well as HTTP handlers and modules. Normally the web.config starts as a neat little pet you can easily manage. But as soon as your project grows mature, web.config turns out to be a huge beast. This article shows you a way to tame the beast.