namespace ConsoleApp5

{

    using System;

​

    public class Program

    {

        public static void Main(string[] args)

        {

​

            var obj1 = new Dummy();

            obj1.X = 10;

​

            var obj2 = obj1;

​

            obj2.X = 30;

​

            var array = new Dummy[]{obj2};

​

            array[0].X = 50;

​

            obj1.X = 90;

​

            //Console.WriteLine(obj1.X);

            //Console.WriteLine(obj2.X);

            //Console.WriteLine(array[0].X);

        }

​

        public class Dummy 

        {

            public int X { get; set; }

        }

    }

}