using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    class Scarlett

    {

        public int Id { get; set; }

        public int BaboCount { get; set; }

        public override string ToString()

        {

            return String.Format(

                "Id: {0}, BaboCount: {1}",

                this.Id,

                this.BaboCount);

        }

    }

    public static void Main()

    {

        var scarletts = new List<Scarlett>

        {

            new Scarlett { Id = 1, BaboCount = 1, },

            new Scarlett { Id = 2, BaboCount = 2, },

            new Scarlett { Id = 3, BaboCount = 1, },

            new Scarlett { Id = 4, BaboCount = 2, },

            new Scarlett { Id = 5, BaboCount = 1, },

        };

        IEnumerable<IGrouping<int, Scarlett>> groupedScarletts = scarletts.GroupBy(s => s.BaboCount);

        foreach (IGrouping<int, Scarlett> gromp in groupedScarletts)

        {

            foreach (Scarlett scarlett in gromp)

            {

                Console.WriteLine(scarlett);

            }

        }

        Console.WriteLine();

        ILookup<int, Scarlett> lookupScarletts = scarletts.ToLookup(s => s.BaboCount);

        foreach (IGrouping<int, Scarlett> gromp in lookupScarletts)

        {

            foreach (Scarlett scarlett in gromp)

            {

                Console.WriteLine(scarlett);

            }

        }

    }

}