I’ve read the intoduction of NDOC, which generates XML documentation from .NET source code. Of course, VS.NET 2003 provides the similar functionality. However, NDOC is more powerful documentation-generator. You can see the details from below.
This document comes from following reference. http://www.codeproject.com/csharp/csharpcommentinganddocs.asp
NDOC project site is http://ndoc.sourceforge.net/