How to make a program x^n in C# ?

I have a situation that i have two textboxes in first textbox i tak 

number and in second textbox i take a power i have a label which shows the answer

when a button is clicked .

        private void button1_Click(object sender, EventArgs e)
        {
            int number= int.Parse(textBox1.Text);
            int power=int.Parse(textBox2.Text);
            for (int x = 0; x >= power; x++)
            {
                number = number * number;
                textBox2.Text = number.ToString();
            }


        }

help me plz..................