using System;

using System.Collections.Generic;

public class Program

{

    public class Person 

    {

        public int Id { get; set; }

        public string Name { get; set; }

    }

​

    static void Main()

    {

        List<Person> existing = new List<Person>() 

        { 

            new Person { Id = 1, Name = "Jack" },

            new Person { Id = 2, Name = "Jill" },

            new Person { Id = 3, Name = "Jerry" }

        };

​

        List<Person> changes = new List<Person>()

        {

            new Person { Id = 2, Name = "Jill" },

            new Person { Id = 3, Name = "Gerry" },

            new Person { Id = 4, Name = "Frank" }

        };

​

        // Write the code to create and fill in following the three lists...

​

        // Added = List of persons from changes list that are not present in the existing list

        List<Person> added;

​

        // Updated = List of persons from changes list that have the same id as a person in the existing list, with a different name

        List<Person> updated;

​

        // Deleted - List of persons from the existing list that do not exist in the changes list

        List<Person> deleted;

​

    }

}