Sandcastle Help File Builder provides a GUI front end to the Microsoft Sandcastle documentation generator tool. As Scott Hanselman has reported, NDoc, the former de facto standard source code documentation generator for .Net has been defunct for some time. I finally downloaded Sandcastle, Microsoft's attempt to fill the void left by NDoc, today, and was not at all happy with the amount of time I spent tweaking the scripts, which involve running 10+ separate command line tools, all of whose command line parameters or other details have changed since the instructions were written. I never did get it to generate docs from the command line, but I stumbled upon the Sandcastle Help File Builder just in the nick of time. It provides an NDoc-style GUI for Sandcastle, and works like a charm. 10 minutes after downloading it, I had my documentation. Thanks, SHFB!