Create a function that a number by value and returns smallest and largest factors of the number through pass by reference.

using System;

namespace st
{

    class HighestLowestFactors
    {

        public static void Main()
        {
            int highfact, lowfact;
            Console.WriteLine("Enter a number : ");
            int num = Int32.Parse(Console.ReadLine());

            GetHighestLowestFactors( num, out highfact, out lowfact);
            Console.WriteLine(
                     "For number {0}, Highest Factor is  {1} and Lowest Factor is : {2}",
                     num, highfact,lowfact );
        }

        public static void GetHighestLowestFactors(int num, out int hf, out int lf)
        {
            // get lowest factor other than 1. In case of prime number 1

            lf = 1;
            for (int i = 2; i <= num / 2; i++)
            {
                if (num % i == 0)
                {
                    lf = i;
                    break;
                }
            }

            // get highest factor other than the number. In case of prime number it is number itself

            hf = num;
            for (int i = num/2 ; i > 1; i--)
            {
                if (num % i == 0)
                {
                    hf = i;
                    break;
                }
            } // for
       } // GetHighestLowestFactors
    } // class
} // namespace