using System;

​

public class Program

{

    public static void Main()

    {

        char[] grades = new char[3]; // declaration & initialization

        grades[0] = 'A';

        grades[1] = 'B';

        grades[2] = 'C';

        Console.WriteLine(grades.Length); // Will return 3

        Console.WriteLine(grades[1]); // Returns value B

        Console.WriteLine("\n**********Update value B to D**********\n");

        grades[1] = 'D';

        Console.WriteLine(grades[1]); // Returns value D

    }

}