using System;

using System.Linq;

using System.Linq.Expressions;

public class Program

{

    public static void Main()

    {

        var intArray = new int[3];

        int defaultValue = 2;

        Array.Fill(intArray, defaultValue);

        Console.WriteLine("Original");

        foreach (var (value, index) in intArray.Select((value, index)  => ( value, index )))

        {

            Console.WriteLine($"{index}: {value}");

        }

        intArray[1] = 999;

        Console.WriteLine("Updated");

        foreach (var (value, index) in intArray.Select((value, index)  => ( value, index )))

        {

            Console.WriteLine($"{index}: {value}");

        }

    }

}