private void ToogleActivate()
{
if (btnSerial.Enabled)
{
SaveConfig();
posPrinter.Ativar();
btnSerial.Enabled = false;
btnAtivar.Text = @"Desativar";
}
else
{
posPrinter.Desativar();
btnSerial.Enabled = true;
btnAtivar.Text = @"Ativar";
}
}