public static void DeleteInstanceASync(CimSession cimSession, string cimNamespace, string cimClassName)
        {
            try
            {
                CimInstance deleteInstance = DeleteInstanceCore(cimSession, cimNamespace, cimClassName);
                if (deleteInstance == null)
                {
                    Console.WriteLine("DeleteInstance operation not performed");
                    return;
                }

                CimAsyncStatus enumeratedInstances = cimSession.DeleteInstanceAsync(cimNamespace, deleteInstance, GetOperationOptions());
                TestObserver<object> observer = new TestObserver<object>();
                IDisposable disposeable = enumeratedInstances.Subscribe(observer);
                observer.WaitForCompletion();
            }
            catch (CimException ex)
            {
                PrintCimException(ex);
            }
            catch( Exception ex)
            {
                Console.WriteLine(ex.Message);
            }            
        }