Represents a globally unique identifier (GUID). GUIDs can be used wherever a unique identifier is required.
[Visual Basic] Public Structure Guid Implements IFormattable [C#] public struct Guid : IFormattable [C++] public __value struct Guid : public IFormattable
[JScript] In JScript, you can use the structures in the NGWS frameworks, but you cannot define your own.
A GUID is a 128-bit integer with such a low probability of being duplicated that it is, for all practical purposes, unique.
Namespace: System
Assembly: mscorlib.dll