Add description to functions and parameters in .NET

While using some library functions in Visual Studio .NET, you can always find such kind of descriptions which help you to get some idea of parameters and functions.

csharp_function_description (by Phanix)

However, how to provide such kind of descriptions in your class libraries?

Plz refer this! http://www.codeproject.com/KB/XML/csharpcodedocumentation.aspx?msg=1643354