private void btntestThroughput_Click(object sender, RoutedEventArgs e)
{
Screen screen = (Screen)cmbxScreenList.SelectedItem;
int size = 240000;
Random rand = new Random();
byte[] data = (new byte[size]).Select(r => (byte)rand.Next(0, 256)).ToArray();
Stopwatch sw = new Stopwatch();
sw.Start();
Connector.Action8TestThroughput(screen, data);
sw.Stop();
MessageBox.Show("time : " + sw.ElapsedMilliseconds + "ms");
}