The C# compiler is able to extract XML comments from C# source files. If at compile time, the /doc command-line option (or the equivalent option in the Visual Studio® .NET IDE) is used to specify a target documentation file, all of the comments are extracted from the source files and are written in an XML format to the target file. Visual Studio .NET can then use this file to display IntelliSense® when the XML file is in the same directory as the compiled assembly (the documentation file must also be named the same as the assembly, with a .xml extension). Both the Visual C++® and Visual Basic® compilers will support this feature in Visual St..