When editing .NET config files (app.config, web.config, etc) in Visual Studio, I get Visual Studio\'s intellisense to guide me when choosing my application\'s settings. If I
You need to create an XSD file for your custom settings and copy it to the schema directory of your visual Studio install. For 2005, this is: %ProgramFiles%\Microsoft Visual Studio 8\XML\Schemas
Here some information on this.
http://blogs.msdn.com/astebner/archive/2005/12/07/501466.aspx