private void button2_Click(object sender, EventArgs e)
{
ModeOfPaymentDiscount frm = new ModeOfPaymentDiscount();
frm.Show();
this.Hide();
}
private void button1_Click(object sender, EventArgs e)
{
this.Hide();
ModeOfPaymentDiscount fr1 = new ModeOfPaymentDiscount();
fr1.ShowDialog();
}