using System;

public class Program

{

    public class Person

    {

        public int PersonId {get; set;}

        public string FirstName{ get; set; }

        public string LastName{ get; set; }

        public Person this[int id] => GetPerson(id);

        private Person GetPerson(int Id)

        {

            return  new Person(){ FirstName= "Amal", LastName = "Dev"};

        }

    }

    public static void Main()

    {

        var person = new Person();

        Console.WriteLine($"Full Name = {person[0].FirstName} {person[0].LastName}");

    }

}