_Type.GUID Property 
Definition
Important
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Provides COM objects with version-independent access to the GUID property.
public:
 property Guid GUID { Guid get(); };public Guid GUID { get; }member this.GUID : GuidPublic ReadOnly Property GUID As GuidProperty Value
The GUID associated with the Type.
Remarks
This property is for access to managed classes from unmanaged code, and should not be called from managed code.
The Type.GUID property gets the GUID associated with the Type.