Gets a universally unique identifier (UUID) that can be used to distinguish between two versions of a module.
Assembly: mscorlib (in mscorlib.dll)
In unmanaged metadata, the GUID returned by the property is referred to as the mvid, and is stored in the GUID heap.
More information about metadata can be found in the Common Language Infrastructure (CLI) documentation, especially "Partition II: Metadata Definition and Semantics". The documentation is available online; see ECMA C# and Common Language Infrastructure Standards on MSDN and Standard ECMA-335 - Common Language Infrastructure (CLI) on the ECMA Web site.