private void RFID_Click(object sender, EventArgs e) { RFID RFid = new RFID(); string ID = RFid.main(); string PIN = RFid.RFID_PIN(); ID = ID.Remove(0, 1); PIN = PIN.Remove(0, 1); List <string>[] RFIDd = mysql.RFID(); if (RFID_check(RFIDd[0], RFIDd[1], ID.Remove(12, 1), PIN.Remove(PIN.Length - 1, 1))) { SingleTon.SetID(ID_); Form2 form2 = new Form2(); form2.Show(); this.Hide(); } else { Form error = new error_login(); error.Show(); Username_TB.Text = ""; Password_TB.Text = ""; } }