Sandcastle is a documentation compiler for Managed class library that generates Microsoft-style Help topics, both conceptual and API reference. It creates API reference topics by combining the XML documentation comments (/// in C# or ' in VB) that are embedded in your source code with the syntax and structure of the types, which it acquires from reflecting against the associated .NET Framework assembly. Skeletal topics are created by using reflection on your project assembly (.dll) file. Additional content, such as remarks and parameter descriptions, is derived from text in the /// comments in your c# source code or ' comments in your VB source code. Conceptual topics are created by converting XML documents that you author.