title: Windows Phone 8.1 automatically close socket after 10 seconds
body: <pre><code>try
  {
      connectButton.IsEnabled = false;
  
      await _socket.ConnectAsync(new HostName(ipConnect.Text), "13928");
  }
  catch(ArgumentException)
  {
      MessageDialog dlg = new MessageDialog("Неверный IP адрес");
      await dlg.ShowAsync();
  }
  catch
  {
      MessageDialog dlg = new MessageDialog("Не удалось подключиться");
      await dlg.ShowAsync();
  }
  
  sr = new StreamReader(_socket.InputStream.AsStreamForRead());
  sw = new StreamWriter(_socket.OutputStream.AsStreamForWrite());
  string opAnswer = sr.ReadLine();
  </code></pre>
  
  <p>As server used Windows 10 UI app on PC with StreamSocketListener. 
  After 10 seconds waiting response from server, opAnswer - null and socket closed.</p>