private static void deleteBatchTaskFile(IoTDAClient client)
        {
            DeleteBatchTaskFileRequest req = new DeleteBatchTaskFileRequest
            {
                FileId     = "5ea7eb66251c3e02075b1525",
                InstanceId = "1a7ffc5c-d89c-44dd-8265-b1653d951ce0"
            };

            try
            {
                var resp = client.DeleteBatchTaskFile(req);
                Console.WriteLine(resp.HttpStatusCode);
                Console.WriteLine(resp.Body);
            }
            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);
            }
        }