Check Armstrong Number in C#

What is Armstrong Number

An ARMSTRONG NUMBER is a number which is made up of N digits and which is equal to the sum of each digit raised to the Nth power. 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Program
{
 class Program
    {
  static void Main(string[] args)
        {
   int num, remainder, sum = 0;
   Console.Write("Enter a number : ");
            num = int.Parse(Console.ReadLine());
  for (int i = num; i > 0; i = i / 10)
            {
                remainder = i % 10;
                sum = sum + remainder*remainder*remainder;
            }
  if (sum == num)
            {
  Console.Write("Entered number is an Armstrong number.");
            }
  else
  Console.Write("Entered number is not an Armstrong number.");
  Console.ReadLine();
        }
     }
  }