C# Full Outer Join Into Object

FullOuterJoinExample.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    public class ColorPrefs
    {
        public string Color { get; set; }
        public string LikedBy { get; set; }
    }

    class Program
    {
        static void Main(string[] args)
        {
            var result = new List<ColorPrefs>();

            var johnColors = new List<string>(new string[] { "red", "green", "purple", "orange", "yellow" });
            var janeColors = new List<string>(new string[] { "black", "red", "orange", "sage", "indigo" });

            var leftOuterJoin = from left in johnColors
                                join right in janeColors on left equals right
                                into grp
                                from g in grp.DefaultIfEmpty()
                                select new ColorPrefs
                                {
                                    Color = left,
                                    LikedBy = left == g ? "BOTH" :"JOHN"
                                };

            var rightOuterJoin = from left in janeColors
                                 join right in johnColors on left equals right
                                 into grp
                                 from g in grp.DefaultIfEmpty()
                                 select new ColorPrefs
                                 {
                                     Color = left,
                                     LikedBy = left == g ? "BOTH" : "JANE"
                                 };

            var unionedjoin = leftOuterJoin.Union(rightOuterJoin);

            foreach(var item in unionedjoin)
            {
                Console.WriteLine($"Color: {item.Color}, LikedBy: {item.LikedBy}");
            }
        }
    }
}