Swapping Program Using C# - Swapping two values in C sharp

SWAPPING PROGRAM

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace SwapUsingRef
{
    class swap
    {
        public void swapping(ref int var1, ref int var2)
        {
             int temp;
            temp = var1;
            var1 = var2;
            var2 = temp;
        }
    }


    class Program
    {
        static void Main(string[] args)
        {

            swap s = new swap();
            int num1 = 5;
            int num2 = 10;

            Console.WriteLine(" VALUES BEFORE SWAPPING \n A={0} and B={1} ", num1, num2);

            s.swapping(ref num1, ref num2);
            Console.WriteLine(" VALUES AFTER SWAPPING \n A={0} and B={0} ", num1, num2);

            Console.ReadLine();
        }
    }
}