One nice features of the JLCA is that it converts javadoc-style comments into the corresponding .NET XML comment. Well, a new tool was released a few weeks ago that can take .NET’s XML documentation and create nice looking files. It is called Sandcastle, and is currently a CTP download. It can create .html files from the source code, which can be processed with the HTML Help Workshop to generate a .chm file. It also has a Visual Studio Add-in that makes the process really easy.
You can download the CTP here, and read all about it in the Sandcastle team blog.