using System;

using System.Collections;

​

namespace ConsoleApp36

{

    class MyList

    {

        private int[] array;

​

        public MyList() 

        {

            array = new int[3];

        }

        public int this[int index]

        {

            get

            {

                return array[index];

            }

​

            set

            {

​

                if (index >= array.Length)

                {

                    Array.Resize<int>(ref array, index + 1);

                    Console.WriteLine("Array Resized : {0}", array.Length);

                }

​

                array[index] = value;

            }

        }

​

        public int Length

        {

            get { return array.Length; }

        }

​

    }

​

​

    public class Program

    {

        public static void Main(string[] args)

        {

            MyList list = new MyList();

            for(int i = 0; i<5; i++)

            {

                list[i] = i;

            }

            for(int i = 0; i < list.Length; i++)

            {

                Console.WriteLine(list[i]);

            }

        }

    }

}

​