using System;

public class Program

{

    public static void Main()

    {

        //declares a rectangular two dimensional array, where the dimensions are 4 × 1

        string[,] strArray = new string[4, 1]; // 2D array

        // assign values to the elements of a rectangular array

        strArray[0, 0] = "Apple";

        strArray[1, 0] = "Banana";

        strArray[2, 0] = "Orange";

        strArray[3, 0] = "Papaya";

​

        // OR

        // string[,]strArray = { { "Apple" }, { "Banana" }, { "Orange" }, { "Papaya" } };

        // Specify the dimension and the index to fetch a value from a specific placeholder. 

        Console.WriteLine(strArray[1, 0]); // return Banana

        Console.WriteLine(strArray[3, 0]); // return Papaya

        Console.WriteLine("\n**********Updated Values**********\n");

        // access a value of an indexed array element by using indexer ([  ]) and then assign a value to it with assignment operator (=). 

        strArray[1, 0] = "Apricot";

        strArray[3, 0] = "Cherry";

        // To fetch a value from a specific placeholder 

        Console.WriteLine(strArray[1, 0]); // return Apricot

        Console.WriteLine(strArray[3, 0]); // return Cherry

​

    }

}