.NET NetworkStream的解决方案.缺少支持的长度

。。。基本上正是标题所说的。未实现NetworkStream.Length。还有什么选择？

我正在尝试进行一系列递归的异步回调，以封装对NetworkStream的调用。BeginRead（…）。要知道我何时达到基本情况并接收到所有字节，我需要知道流中的字节长度。有解决办法吗？

代码（此代码的入口点在TcpListen.BeginConceptTcpClient调用之后写入。：

private void StartRead(IAsyncResult ar)
{
   try
   {
      //Do an initial read:
      AsyncClient client = (AsyncClient)ar.AsyncState;
      int amountRead = 0;
      try
      {
         amountRead = client.ClientStream.EndRead(ar);
      }
      catch (IOException io)
      {
         ProcessDebugLog("Async read complete", io);
         client.ClientStream.Close();
         return;
      }
      string text = Encoding.UTF8.GetString(client.Bytes, 0, amountRead);
      //If TCP segmentation has occurred, more blocks will have
      // to get read in:
      if (client.ClientStream.Position < client.ClientStream.Length /*EXCEPTION HERE*/)
      {
         try
         {
            client.ClientStream.BeginRead(client.Bytes, 0, client.Bytes.Length, StartRead, client);
         }
         catch (IOException io)
         {
            ProcessDebugLog("Async read complete", io);
            client.ClientStream.Close();
         }
      }
      else
      {
         client.ClientStream.Close();
      }
   }
   catch (Exception ex)
   {
      ProcessDebugLog("ERROR - StartRead", ex);
   }
}