title: What is the value of adding a GuidAttribute to a class?
body: <p>What is the value of adding a GUID to C# class? Look at the example using this link: <a href="https://msdn.microsoft.com/en-us/library/system.runtime.interopservices.guidattribute(v=vs.90).aspx" rel="nofollow">https://msdn.microsoft.com/en-us/library/system.runtime.interopservices.guidattribute(v=vs.90).aspx</a></p>