using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        string[] lines = {"Blue,era,Colors/col_image,37,1",

                          "Pink,aka,Colors/col_image,37,2",

                          "BlueJay,oko,Birds/col_image,38,3" };

​

        List<StuffType> stuff = (from line in lines

                                 let data = line.Split(',').ToList()

                                 select new StuffType

                                 {

                                     Category = DefineRange(Convert.ToInt16(data[3])),

                                     dailyStuffs = (from l in lines

                                                    let d = l.Split(',').ToList()

                                                    select new DailyStuffs { StuffName = d[0] }).ToList()

                                 }).ToList();

        foreach(var s in stuff){

            Console.WriteLine(s.Category);

            foreach(var d in s.dailyStuffs){

                Console.WriteLine("\t" + d.StuffName);

            }

        }

    }

​

    private static string DefineRange(int value){

        if (value >= 1 && value <= 37)

            return "Colors";

        else

            return "Birds";

    }

    public class DailyStuffs

    {

        public string StuffName { get; set; }

        public string ConvertedName { get; set; }

        public string StuffImage { get; set; }

        public int CategoryId { get; set; }

    }

     public class StuffType

    {

       public string Category { get; set; }       

       public List<DailyStuffs> dailyStuffs;

    }

}