public void DiscardOutBuffer()
{
DGSerial serial1 = new DGSerial(_portName1, _baudRate1);
serial1.Open();
byte[] buffertx = new byte[serial1.Get().WriteBufferSize];
serial1.WriteBytes(buffertx);
serial1.DiscardOutBuffer();
Assert.That(serial1.BytesToRead(), Is.EqualTo(0));
serial1.Close();
}