using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public class Human

{

    public string FirstName{ get; set; }

    public string LastName{ get; set; }

    public List<Clothing> clothings { get; set; }

}

​

public class Clothing

{

    public string ClothingID{ get; set; }

    public string ColorTop{ get; set; }

    public string ColorPants{ get; set; }

}

​

public class CurrentClothes

{

    public string ColorTop{ get; set; }

    public string ColorPants{ get; set; }

}

    public static void Main()

    {

        Human h = new Human();

        h.clothings = new List<Clothing>();

        h.clothings.Add(new Clothing() { ColorTop = "Green", ColorPants = "A" });

        h.clothings.Add(new Clothing() { ColorTop = "Red", ColorPants = "B" });

        h.clothings.Add(new Clothing() { ColorTop = "Blue", ColorPants = "C" });

        h.clothings.Add(new Clothing() { ColorTop = "Brown", ColorPants = "D" });

        h.clothings.Add(new Clothing() { ColorTop = "Turqoise", ColorPants = "T" });

        List<CurrentClothes> currentClothes = new List<CurrentClothes>();

        currentClothes.Add(new CurrentClothes() { ColorTop = "Green", ColorPants = "A" });

        currentClothes.Add(new CurrentClothes() { ColorTop = "Turqoise", ColorPants = "T" });

        currentClothes.Add(new CurrentClothes() { ColorTop = "Red", ColorPants = "X" });

        var sameClothings = h.clothings.Where(x => currentClothes.Any(s => s.ColorPants == x.ColorPants && s.ColorTop == x.ColorTop)).ToList();

        foreach(var item in sameClothings) {

            Console.WriteLine($"{item.ColorTop}-{item.ColorPants}");

        }

    }

}