C开发OSS工具，分组上传文件时流关闭的问题，求教！

我也遇到了这种情况，求解

[ObjectDisposedException: 无法访问已关闭的流。]
   System.IO.__Error.StreamIsClosed()  57
   System.IO.MemoryStream.Seek(Int64 offset, SeekOrigin loc)  7728068
   Aliyun.OpenServices.Common.Communication.RetryableServiceClient.SendImpl(ServiceRequest request, ExecutionContext context, Int32 retries) in d:\workspace\openapi\trunk\dotnet\aliyunapi\Common\Communication\RetryableServiceClient.cs:73
   Aliyun.OpenServices.Common.Communication.RetryableServiceClient.Send(ServiceRequest request, ExecutionContext context) in d:\workspace\openapi\trunk\dotnet\aliyunapi\Common\Communication\RetryableServiceClient.cs:54
   Aliyun.OpenServices.OpenStorageService.Commands.OssCommand.Execute() in d:\workspace\openapi\trunk\dotnet\aliyunapi\OpenStorageService\Commands\OssCommand.cs:72
   Aliyun.OpenServices.OpenStorageService.Commands.OssCommand`1.Execute() in d:\workspace\openapi\trunk\dotnet\aliyunapi\OpenStorageService\Commands\OssCommand.cs:116
   Aliyun.OpenServices.OpenStorageService.OssClient.CompleteMultipartUpload(CompleteMultipartUploadRequest completeMultipartUploadRequest) in d:\workspace\openapi\trunk\dotnet\aliyunapi\OpenStorageService\OssClient.cs:401
   Uploader.Step3() in g:\项目\代码\云\AliyunOSS Server\Uploader.ashx:159
   Uploader.ProcessRequest(HttpContext context) in g:\项目\代码\云\AliyunOSS Server\Uploader.ashx:56
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()  181
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)  75

搞嘛啊，没人给个指点啥的。

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我的方式是把请求时间加大。