using System;

​

public class Program

{

    public static void Main()

    {

        int a = 5;

        int b = a;

        Console.WriteLine(a);

        Console.WriteLine(b);

        //copy of vallue type is updated

        b = 2;

        Console.WriteLine(a);

        Console.WriteLine(b);

        //ref type class example

        utility obj = new utility();

        obj.data = 1;

        utility obj2 = obj;

        Console.WriteLine(obj.data);

        Console.WriteLine(obj2.data);

        obj2.data = 25;

        Console.WriteLine(obj.data);

        Console.WriteLine(obj2.data);

    }

​

    public class utility

    {

        public int data;

    }

}