using System;

using System.Collections;

using System.Collections.Generic;

using System.Linq;

​

public class Program

{

    private static List<Combination> _Combinations = new List<Combination>();

    public static void Main()

    {

        _Combinations.Add(new Combination{ CombinationSet = new List<int>{ 1, 2, 3}});

        _Combinations.Add(new Combination{ CombinationSet = new List<int>{ 2, 3, 4}});

        _Combinations.Add(new Combination{ CombinationSet = new List<int>{ 3, 2, 1}});

        _Combinations.Add(new Combination{ CombinationSet = new List<int>{ 1, 2, 3}});

        Console.WriteLine("Test 1  (1,2,3)");

        foreach(var result in FindCombinations(1,2,3))

        {

            Console.WriteLine(result.ToString());

        }

        Console.WriteLine("Test 1  (3,2,1)");

        foreach(var result in FindCombinations(3,2,1))

        {

            Console.WriteLine(result.ToString());

        }

        Console.WriteLine("Test 1  (1,2)");

        foreach(var result in FindCombinations(1,2))

        {

            Console.WriteLine(result.ToString());

        }

    }

​

    public static List<Combination> FindCombinations(params int[] values)

    {

        var result = _Combinations

            .Where(c => c.IsSequenceEqual(values))

            .ToList();

        return result;

    }

​

    public class Combination

    {

        public List<int> CombinationSet { get; set; }

        public bool IsSequenceEqual(params int[] values)

        {

            return Enumerable.SequenceEqual(CombinationSet, values);

        }

        public override string ToString()

        {

            return string.Join(", ", CombinationSet);

        }

    }

}