Program for Reverse number without in-build function in asp.net c#

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace reversenumber

{

    class Program

    {

        static void Main(string[] args)

        {

            Console.WriteLine("Enter a Number");

            int num = int.Parse(Console.ReadLine());

            int rev = 0;

            while (num > 0)

            {

                int rem = num % 10;

                rev = (rev * 10) + rem;

                num = num / 10;

              

            }

            Console.WriteLine("Reverse number={0}", rev);

            Console.ReadLine();

        }

    }

}