using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        string Ename;

        int EphoneNumber;

        int Eage;

        int sel = 0;

        int num = 0;

        List<Contact> myContacts = new List<Contact>();

        while (sel !=1){

            int contador = 0;

            int elcon;

            Console.WriteLine("Bienvenido:");

            Console.WriteLine("¿Qué quieres hacer?");

            Console.WriteLine("1 Agregar Contacto");

            Console.WriteLine("2 Ver Contactos");

            Console.WriteLine("3 Eliminar Contactos");

            Console.WriteLine("4 Salir");

            num = Convert.ToInt32(Console.ReadLine());

            switch(num){

                case 1: 

                    Console.WriteLine("");

                    Console.WriteLine("Introduce el nombre");

                    Ename = Console.ReadLine();

                    Console.WriteLine("Introduce Numero telefónico");

                    EphoneNumber = Convert.ToInt32(Console.ReadLine());

                    Console.WriteLine("Introduce la edad");

                    Eage = Convert.ToInt32(Console.ReadLine());

                    myContacts.Add(new Contact{

                        Name = Ename,

                        PhoneNumber = EphoneNumber,

                        Age = Eage

                    });

                    Console.WriteLine("Contacto Registrado con exito");

                    Console.WriteLine("");

                    break;  

                case 2: 

                    foreach(var Contact in myContacts){

                        Console.WriteLine("*************");

                        Console.WriteLine(Contact.Name);

                        Console.WriteLine(Contact.PhoneNumber);

                        Console.WriteLine(Contact.Age);

                        Console.WriteLine("");

                    }

                    break; 

                case 3:

                        foreach(var Contact in myContacts){

                            Console.WriteLine("Contacto #"+ contador);

                            Console.WriteLine(Contact.Name);

                            Console.WriteLine();

                            contador++;

                        }

                        Console.WriteLine("¿Qué contacto quieres borrar?");

                        elcon = Convert.ToInt32(Console.ReadLine());

                        myContacts.RemoveAt(elcon);

                        Console.WriteLine("Contacto eliminado con exito");

                    break;

                case 4:

                    sel =1;

                    Console.WriteLine("Adios");

                    break;

            }

    }

    }

}

​

class Contact {

    public string Name{get; set;}

    public int PhoneNumber{get; set;}

    public int Age{get; set;}

}

​

​