上传OSS，偶尔失败

我使用 C#的接口上传到OSS，多数情况下没问题，可是偶尔却会报下面的错

The remote name could not be resolved: 'yixuexiao-2.oss-cn-hangzhou.aliyuncs.com'   at Aliyun.OpenServices.Common.Communication.RetryableServiceClient.SendImpl(ServiceRequest request, ExecutionContext context, Int32 retries)
   at Aliyun.OpenServices.Common.Communication.RetryableServiceClient.Send(ServiceRequest request, ExecutionContext context)
   at Aliyun.OpenServices.OpenStorageService.Commands.OssCommand.Execute()
   at Aliyun.OpenServices.OpenStorageService.Commands.OssCommand`1.Execute()
   at Aliyun.OpenServices.OpenStorageService.OssClient.PutObject(String bucketName, String key, Stream content, ObjectMetadata metadata)
   at OSS.Storage.uploadFolder(String[] files, String substr, String yundir, String title)


我在很多机器上都重现了这个问题，关键这个问题不是每次都会出现，是不是OSS的服务不稳定？


请大神们抽空帮我看看，谢谢。