Write a Program Given Number is Prime Number or Not?

 protected void CheckGivenNumerIsPrimeOrNot()

 {

  int number = Convert.ToInt32(textBox1.Text);

  int i;

  for (i = 2; i < number; i++)

  {

   if (number % i == 0)

   {

     MessageBox.Show("Number is  not a prime");

     break;

   }

  }

  if(i==number)

  {

     MessageBox.Show("Number is  a prime");

  }

}