Write a program to swap two numbers using call by reference.

 Write a program to swap two numbers using call by reference.

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

namespace tutorial3
{
    class prog3
    {
        public void pro(ref int a, ref int b)
        {
            int temp;
            temp = a;
            a = b;
            b = temp;
            Console.WriteLine("After the swaping first no is... "+a);
            Console.WriteLine("After the swaping first no isd..."+b);
        }
        public void swap()
        {
            Console.WriteLine("Enter first no...");
            int a = int.Parse(Console.ReadLine());
            Console.WriteLine("Enter second no...");
            int b = int.Parse(Console.ReadLine());
            Console.WriteLine("Before swaping first no..."+a);
            Console.WriteLine("Before swaping second no..."+b);
            pro(ref a, ref b);

        }
    }

}

 static void Main(string[] args)

        {

            

            prog3 p = new prog3();

            p.swap();

        }

output:-