This exception signals that an invalid COM object has been used.

public class InvalidComObjectException : SystemException {
// Public Constructors
   public InvalidComObjectException( );
   public InvalidComObjectException(string message);
   public InvalidComObjectException(string message, Exception inner);
// Protected Constructors
   protected InvalidComObjectException(System.Runtime.Serialization.SerializationInfo info,
       System.Runtime.Serialization.StreamingContext context);
}

Hierarchy

System.Object System.Exception(System.Runtime.Serialization.ISerializable) System.SystemException InvalidComObjectException