using System;

using System.Collections.Generic;

using System.Linq;

using System.IO;

using System.Globalization;

using CsvHelper;

public class Program

{

    public static void Main()

    {

        // Pretend the file is already created...

        var configFilePath = "monsters.csv";

        File.WriteAllLines(configFilePath, new []

                           {

                               "Gender,Age,Type,Result",

                               "Male,Young,Fire,1",

                               "Male,Old,Ice,2",

                               "Female,Young,Fire,4"

                                //...

                           });

        // The code you need

        var monsterLookup = new MonsterLookup(configFilePath);

        var myMonster = new Monster { Gender = "Male", Age = "Old", Type = "Ice" };

        var result = monsterLookup.GetResult(myMonster);

        Console.WriteLine("Result: " + result);

    }

}

​

public class MonsterLookup

{

    private readonly List<Monster> _lookupList;

    public MonsterLookup(string configFilePath)

    {

        using var reader = new StreamReader(configFilePath);

        using var csv = new CsvReader(reader, CultureInfo.InvariantCulture);

        _lookupList = csv.GetRecords<Monster>().ToList();

    }

    public int GetResult(Monster monster)

    {

        var match = _lookupList.FirstOrDefault(

            m => m.Gender == monster.Gender

                && m.Age == monster.Age

                && m.Type == monster.Type);

        return match?.Result ?? -1;

    }

}

​

public class Monster

{

    public string Gender { get; set; }

    public string Age { get; set; }

    public string Type { get; set; }

    public int Result { get; set; }

}