InterfaceMultipleImplementation

using System;

namespace PersonInfo
{
    interface IIdentifiable
    {
         string Id { get; set; }
    }
    interface IBirthable
    {
         string Birthdate { get; set; }
    }

    public class Citizen :IIdentifiable,IBirthable
    {
        public Citizen(string name,int age,string id,string birthday)
        {
            Name = name;
            Age = age;
            Id = id;
            Birthdate = birthday;
        }
        public string Name { get; set ; }
        public int Age { get ; set; }
        public string Id { get; set; }
        public string Birthdate { get; set; }
    }
    public class StartUp
    {
    }
    class Program
    {
        static void Main(string[] args)
        {
            string name = Console.ReadLine();
            int age = int.Parse(Console.ReadLine());
            string id = Console.ReadLine();
            string birthday = Console.ReadLine();
            IIdentifiable identifiable = new Citizen(name, age, id, birthday);
            IBirthable birthable = new Citizen(name, age, id, birthday);
            Console.WriteLine(identifiable.Id);
            Console.WriteLine(birthable.Birthdate);

        }
    }
}