private static void showAsyncDeviceCommand(IoTDAClient client)
        {
            ShowAsyncDeviceCommandRequest req = new ShowAsyncDeviceCommandRequest
            {
                InstanceId = "1a7ffc5c-d89c-44dd-8265-b1653d951ce0",
                DeviceId   = "5eeb1fefbc61700402bc35f9_1211211",
                CommandId  = "cvdcv",
            };

            try
            {
                var resp = client.ShowAsyncDeviceCommand(req);
                Console.WriteLine(resp.Result);
            }
            catch (RequestTimeoutException requestTimeoutException)
            {
                Console.WriteLine(requestTimeoutException.ErrorMessage);
            }
            catch (ServiceResponseException clientRequestException)
            {
                Console.WriteLine(clientRequestException.HttpStatusCode);
                Console.WriteLine(clientRequestException.ErrorCode);
                Console.WriteLine(clientRequestException.ErrorMsg);
            }
            catch (ConnectionException connectionException)
            {
                Console.WriteLine(connectionException.ErrorMessage);
            }
        }