Sandcastle produces accurate, MSDN style, comprehensive documentation by reflecting over the source assemblies and optionally integrating XML Documentation Comments. Sandcastle has the following key features:

Works with or without authored comments

Supports Generics and .NET Framework 2.0

Sandcastle has 2 main components (MrefBuilder and Build Assembler)

MrefBuilder generates reflection xml file for Build Assembler

Build Assembler includes syntax generation, transformation..etc

Sandcastle is used internally to build .Net Framework documentation