.NET: How do I determine if an object is a COM object?

Question

How do I determine if an object is a COM object? I need to call Marshal.FinalReleaseComObject on all COM objects in an array of type Object.

Answer 1

Marshal.IsComObject

Answer 2

You can call GetType() and inspect the IsCOMObject property

Answer 3

typeof(myObject).IsCOMObject

or

instanceOfMyObject.GetType().IsCOMObject