using System;

public class Program

{

    public static void Main()

    {

        string myChoice; 

        do

        {

            //print a memu 

    Console.WriteLine("My Address Book is ");

        Console.WriteLine("A - Add New Address ");

        Console.WriteLine("D - Delate Address ");

        Console.WriteLine("M - Modify Address ");

        Console.WriteLine("V - View Addresses ");

        Console.WriteLine("Q - Quit\n"); 

        Console.WriteLine("Choice (A,D,M,V, or Q) ");

        //REtrieve the user's choice 

        myChoice=Console.ReadLine();

        //Make a descion based on the user's choice 

        switch(myChoice.ToUpper())

        {

            case "A":

            case "a":

            Console.WriteLine("You wish to add on address.");

            break;

            case "D":

            case "d":

                Console.WriteLine("You wish to delate an address");

                break;

                case "M":

                case "m":

                Console.WriteLine("you wish to modify an address");

                break;

            case "V" :

            case "v":

                Console.WriteLine("You wish to view address");

                break;

            case "Q" :

            case "q" :

                Console.WriteLine("Good");

                break;

                    default:

                Console.WriteLine("(0) is not a vaild choice", myChoice);

                break;

        }

                //Pause to allow the user tp see the results 

                //Console.Write("press Enter key to continue...");

                //Console.Readline();

    } while(myChoice == "A" || myChoice == "D" || myChoice == "M"); //Keep going until the user wants to quit

        // || means or

    Console.WriteLine("Bye");

}

    }