
        private void button1_Click(object sender, EventArgs e)
        {
            string st1 = textBox1.Text;
            string st2 = textBox2.Text;
            int i = st2.IndexOf(st1);
            if (i > -1)
                label3.Text = " Location is " + i.ToString();
            else
                label3.Text = " Not found";
        }
