using System;

using System.Collections.Generic;

using System.Text;

using System.IO;

​

namespace Doloop

{

    public class Doloop

    {

        public void Main(string[] args)

        {

           string myChoise;

            Console.WriteLine("My Address Book");

            Console.WriteLine("Menu of Address Book to perform your's Choice");

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

            Console.WriteLine("D.Delete address");

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

            Console.WriteLine("V.View Address");

            Console.WriteLine("Q.Quit");

            Console.WriteLine("Please Enter Your Choice to updation of Address (A,D,M,V,Q)");

            myChoise = Console.ReadLine();

switch(myChoise)

{

case "A" :

case "a" :

Console.WriteLine("You wish to add an Address");

Console.ReadLine();

break;

case "D" :

case "d" :

Console.WriteLine("You wish to Delete an Address ");

Console.ReadLine();

break;

case "M" :

case "m" :

Console.WriteLine("You wish to Modify an Address ");

Console.ReadLine();

break;

case "V" :

case "v" :

Console.WriteLine("You wish to View an Address ");

Console.ReadLine();

break;

case "Q" :

case "q" :

Console.WriteLine("You wish to Quit ");

Console.ReadLine();

break;

default :

Console.WriteLine("Invalid Input ");

Console.ReadLine();

break;

        }

            Console.WriteLine("Press any key to Continue");

            Console.ReadLine();

            Console.ReadLine();

            while(myChoise != "Q" && myChoise != "q");

            }

        }

    }

​