public void payment()
        {
            TPB      TT  = Application.OpenForms.OfType <TPB>().FirstOrDefault();
            Fursan   l   = new Fursan();
            PlatCard pc  = new PlatCard();
            Airline  air = new Airline();
            double   final;
            double   a  = 2500;
            Hotel    gt = new Hotel();

            final = a + air.tkbill + gt.hbill;
            final = final * 1.24;
            MessageBox.Show("Your Final bill is : " + final, " BILL ", MessageBoxButtons.OK, MessageBoxIcon.Information);
            if (l.check == 1)
            {
                final = final - 500;
                MessageBox.Show("You have recieved a flat discount of 500 PKR for being a Fursan Member , your bill now is : " + final, "Fursan account logged in", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
            if (TT.pcard.Checked == true)
            {
                pc.Credit = 200000;
                final     = final * pc.discount;
                MessageBox.Show(Convert.ToString(final));
                pc.Credit = pc.Credit - final;
                MessageBox.Show("YOU HAVE RECIEVED A 25% FOR BEING A PLATCARD OWNER AND YOUR BILL NOW IS : " + final + " \nYour payment has been received ," +
                                " deducted from your credit . Your remaining balance is : " + pc.Credit + " Thank you for choosing BABAJI TRAVEL AGENCY", "Payment Rceived", MessageBoxButtons.OK, MessageBoxIcon.Information);
                TT.Close();
                Home hm = new Home();
                hm.Show();
            }
            else if (TT.gcard.Checked == true)
            {
                GoldCard gc = new GoldCard();
                gc.Credit = 100000;
                final     = final * gc.discount;
                gc.Credit = gc.Credit - final;
                MessageBox.Show("YOU HAVE RECIEVED A 15% FOR BEING A GOLDCARD OWNER AND YOUR BILL NOW IS : " + final + " \nYour payment has been received ," +
                                " deducted from your credit . Your remaining balance is : " + gc.Credit + " Thank you for choosing BABAJI TRAVEL AGENCY", "Payment Rceived", MessageBoxButtons.OK, MessageBoxIcon.Information);
                TT.Hide();
                Home hm = new Home();
                hm.Show();
            }
            else if (TT.ccard.Checked == true)
            {
                Card c = new Card();
                c.Credit = c.Credit - final;
                MessageBox.Show(" YOUR BILL IS : " + final + " Your payment has been received ," +
                                " deducted from your credit . Your remaining balance is : " + c.Credit + " Thank you for choosing BABAJI TRAVEL AGENCY", "Payment Rceived", MessageBoxButtons.OK, MessageBoxIcon.Information);
                TT.Close();
                Home hm = new Home();
                hm.Show();
            }
            else
            {
                MessageBox.Show("Please select card type", "Payment", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        }
        private void button3_Click(object sender, EventArgs e)
        {
            DOperations dao = new DOperations();

            try
            {
                Hotel ht = new Hotel();
                ht.Hotels();
                ht.Assignvalues();
                TPB     TP = new TPB();
                Payment tp = new Payment();
                tp.show();
                TP.Show();
                this.Hide();
            }
            catch (Exception ex) { MessageBox.Show(ex.Message, "Exception Unhandled", MessageBoxButtons.OK, MessageBoxIcon.Error); }
        }