private static void addDevice(IoTDAClient client)
        {
            AddDeviceRequest req = new AddDeviceRequest
            {
                Body = new AddDevice()
                {
                    NodeId    = "1211211",
                    ProductId = "5e25d39a3b7c24fa3638804b"
                }
            };

            try
            {
                var resp = client.AddDevice(req);
                Console.WriteLine(resp);
            }
            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);
            }
        }