Imperative and Functional coding in C#

ImperativeFunctional.cs

using System;
using System.Collections.Generic;
using System.Linq;

namespace HigherOrderFunctions
{
    enum Tech
    {
        Red,
        Green,
        Blue,
        Yellow
    }

    internal class Skill
    {
        internal string Name { get; set; }
        internal ushort Age { get; set; }
        internal Tech Technology { get; set; }
        internal ushort Score { get; set; }
    }

    public class ImperativeFunctional
    {
        internal static IDictionary<Tech, string> GetAnswerImperative(IEnumerable<Skill> skills)
        {
            var scoreNames = new Dictionary<Tech, Skill>();

            foreach (var skill in skills)
            {
                if (skill.Age >= 40)
                    continue;

                if (!scoreNames.ContainsKey(skill.Technology) || scoreNames[skill.Technology].Score < skill.Score)
                    scoreNames[skill.Technology] = skill;
            }

            var answer = new Dictionary<Tech, string>();
            foreach (var keyValue in scoreNames)
                answer[keyValue.Key] = keyValue.Value.Name;

            return answer;
        }

        internal static IDictionary<Tech, string> GetAnswerFunctional(IEnumerable<Skill> skills)
        {
            return skills.
                Where(skill => skill.Age < 40).
                GroupBy(skill => skill.Technology).
                Select(group => new KeyValuePair<Tech, string>(group.Key, group.
                    OrderByDescending(skill => skill.Score).
                    Select(skill => skill.Name).
                    FirstOrDefault())
                ).
                ToDictionary(kvp => kvp.Key, kvp => kvp.Value);
        }

        public static void Main(string[] args)
        {
            var skills = new List<Skill>
                {
                    new Skill { Name = "alice", Age = 24, Technology = Tech.Blue, Score = 86 },
                    new Skill { Name = "alice", Age = 24, Technology = Tech.Green, Score = 80 },
                    new Skill { Name = "bob", Age = 20, Technology = Tech.Red, Score = 76 },
                    new Skill { Name = "bob", Age = 20, Technology = Tech.Green, Score = 68 },
                    new Skill { Name = "charlie", Age = 45, Technology = Tech.Blue, Score = 96 },
                    new Skill { Name = "dylan", Age = 32, Technology = Tech.Blue, Score = 75 },
                    new Skill { Name = "dylan", Age = 32, Technology = Tech.Green, Score = 81 },
                    new Skill { Name = "dylan", Age = 32, Technology = Tech.Red, Score = 54 },
                    new Skill { Name = "evelyn", Age = 29, Technology = Tech.Green, Score = 83 },
                    new Skill { Name = "evelyn", Age = 29, Technology = Tech.Red, Score = 78 },
                    new Skill { Name = "francis", Age = 19, Technology = Tech.Red, Score = 64 }
                };

            Console.WriteLine("Imperative Answer: {{{0}}}", string.Join(", ", GetAnswerImperative(skills).Select(kvp => string.Format("{0}: '{1}'", kvp.Key, kvp.Value))));
            Console.WriteLine("Functional Answer: {{{0}}}", string.Join(", ", GetAnswerFunctional(skills).Select(kvp => string.Format("{0}: '{1}'", kvp.Key, kvp.Value))));

            Console.ReadKey();
        }
    }
}