private void button1_Click(object sender, EventArgs e)
        {
            String string1;
            String string2;
            string1 = textBox1.Text;
            string2 = textBox2.Text;

            int position = 0;
            while (position != -1)
            {
                position = string1.IndexOf(string2, position);
            }
            if (position != -1)
            {
                position = position + 1;
                label1.Text = ("Antalet bokstäver=" + position);
            }


            if (string1.IndexOf(string2) == -1)

            { label1.Text = "Not Found";
            }
        }