Oss.OssClient.CompleteMultipartUpload C# (CSharp) Метод

        public async Task<CompleteMultipartUploadResult> CompleteMultipartUpload(CompleteMultipartUploadModel completeMultipartUploadModel)
        {
            CompleteMultipartUploadResult result = null;
            OssHttpRequestMessage httpRequestMessage = null;
            HttpResponseMessage response = null;
            try
            {

               
                Dictionary<string, string> parameters = new Dictionary<string, string>();
                parameters.Add("uploadId", completeMultipartUploadModel.UploadId);


                httpRequestMessage = new OssHttpRequestMessage(completeMultipartUploadModel.Bucket, completeMultipartUploadModel.Key, parameters);

                httpRequestMessage.Method = HttpMethod.Post;
                httpRequestMessage.Headers.Date = DateTime.UtcNow;

                XmlStreamSerializer<CompleteMultipartUploadModel> serializer = new XmlStreamSerializer<CompleteMultipartUploadModel>();
              //  FileStream fileStream = new FileStream("1.xml", FileMode.Open);

                //httpRequestMessage.Content = new StreamContent(fileStream);
                httpRequestMessage.Content = new StreamContent(serializer.Serialize(completeMultipartUploadModel));

                OssRequestSigner.Sign(httpRequestMessage, networkCredential);
                response = await httpClient.SendAsync(httpRequestMessage);

                if (response.IsSuccessStatusCode == false)
                {
                    await ErrorResponseHandler.Handle(response);
                }
                var temp = DeserializerFactory.GetFactory().CreateCompMultiUploadDeserializer();
                result = await temp.Deserialize(response);

            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                if (httpRequestMessage != null)
                    httpRequestMessage.Dispose();

                if (response != null)
                    response.Dispose();
            }
            return result;

        }