Windows 8.1商店应用

Question

我有一个服务器 - 客户端连接，双方都使用Windows.Networking.Sockets.StreamSocket。在Windows 10上，作为Universal App，连接成功，数据来回流动而没有问题。在Windows 8.1上，作为Windows应用商店应用，StreamSocket的读取部分在首次尝试读取传入数据时失败。应用程序关闭，VS 2015不报告任何Exception，输出窗口也不包含Program has exited with code 1以外的任何有用信息。此外，设置断点然后单步执行代码并不起作用。不显示本地，VS显示消息对话框：

  

无法开始调试。调用的对象已与其客户端断开连接。

以下是阅读代码：

public IAsyncAction Read()
{
    return Task.Run(() =>
    {
        try
        {
            const uint length = 65536;
            string request = string.Empty;
            var socket = _signalingSocketService.GetSocket();
            var readBuf = new Windows.Storage.Streams.Buffer(length);
            var readOp = socket.InputStream.ReadAsync(readBuf, length, InputStreamOptions.Partial);
            readOp.Completed = (IAsyncOperationWithProgress<IBuffer, uint> asyncAction, AsyncStatus asyncStatus) =>
            {
                if(asyncStatus == AsyncStatus.Completed)
                {
                    var localBuffer = asyncAction.GetResults();
                    var dataReader = DataReader.FromBuffer(localBuffer);
                    request = dataReader.ReadString(dataReader.UnconsumedBufferLength);
                    _signalingSocketService.HandoffSocket(socket);

                    List<string> requests;
                    var fileTask = BufferFileExists().AsTask();
                    fileTask.Wait();
                    if (fileTask.Result)
                    {
                        var bufferFileTask = GetBufferFile().AsTask();
                        bufferFileTask.Wait();
                        var bufferFile = bufferFileTask.Result;

                        var task = FileIO.AppendTextAsync(bufferFile, request).AsTask();
                        task.Wait();

                        var readLinesTask = FileIO.ReadLinesAsync(bufferFile).AsTask();
                        readLinesTask.Wait();
                        requests = (readLinesTask.Result).ToList();

                        var deleteTask = bufferFile.DeleteAsync().AsTask();
                        deleteTask.Wait();
                    }
                    else
                    {
                        requests =
                            request.Split(new[] { Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries).ToList();
                    }
                } // if (asyncStatus == AsyncStatus.Completed)
            }; // readOp.Completed
        }
        catch (Exception ex)
        {
        }
    }
}

什么可能导致这种奇怪的行为？