C# da Fonksiyon Hesaplama

C# da fonksiyon hesaplama

        private void button1_Click(object sender, EventArgs e)

        {

            double a, x, y;

            x = Convert.ToInt32(textBox1.Text);

            y = Convert.ToInt32(textBox2.Text);

            if (x>y)

            {

                a = (x * x - y * y) / (x + 3);

                label4.Text = Convert.ToString(a);

            }

            else

            {

                a = (y * y - x * x) / y;

                label4.Text = Convert.ToString(a);

            }

c#