private void rfid_Tag(object sender, RFIDTagEventArgs e)
{
RFID rf = (RFID)sender;
rf.Channel = 2;
rf.Open();
// SendEmail();
label2.Text = "Amount sent: " + amountSent;
dig.BeginSetState(true, TurnOn, null);
this.BackColor = Color.Green;
Process.Start("chrome", "http://www.google.dk");
dig.BeginSetState(false, TurnOff, null);
// this.BackColor = Color.Gray;
}