c# WebClient上传文件到远程服务器

WebClient dailyClient = new WebClient();
                    if (dailyClient.IsBusy) { dailyClient.CancelAsync(); }
                    dailyClient.UploadFileAsync(new Uri(remoteDailyPath + "/" + paperName), "PUT", tempPath);
                    dailyClient.UploadFileCompleted += new UploadFileCompletedEventHandler(dailyClient_UploadFileCompleted);