private void button1_Click(object sender, EventArgs e)
        {
            HappyBirthday hb = new HappyBirthday();

            MessageBox.Show(hb.getmessage("happy birthday!"));
            this.Close();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            HappyBirthday hb = new HappyBirthday();

            MessageBox.Show("happy Birthday " + txtfname.Text + "  " + txtlname.Text);
        }