private void SendPackageDisplayAreaAutoClear(object sender, RoutedEventArgs e)
 {
     //超过10MB就自动清除。
     if (TxtSendBytes.Text.Length > 10485760)
     {
         TxtSendBytes.Clear();
     }
 }
 private void ClearSendPackageDisplayArea(object sender, RoutedEventArgs e) => TxtSendBytes.Clear();