I wrote a while back on available tools for generating help file for your .Net application, and recommended using the Sandcastle Help file builder (last updated on 01/2008). It a GUI wrapper for the Microsoft Sandcastle document compiler . You also need to enable xml documentation file creation in your project properties. and there are further instructions in a Codeproject article (which may also be a bit outdated). Seems the situation is about the same almost a year later: NDoc is dead, NDoc05 was...