private void button5_Click(object sender, EventArgs e)
        {
            metropanel mp = new metropanel();

            mp.Show();
            this.Hide();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            string        query = "select * from Login where username='******' and password='******' and SecretKey='" + secret.Text + "'";
            SqlDataReader sd    = con.ret_dr(query);

            if (sd.Read())
            {
                MessageBox.Show("lOGIN sUCESS......");
                metropanel mp = new metropanel();
                mp.Show();
            }
            else
            {
                MessageBox.Show("Invalid Login");
            }
        }