using System;

using System.Collections.Generic;

​

public static class Program

{

    public static void Main()

    {

        var moves = new List<Move>

        {

            new Move(1, 2),

            new Move(3, 4),

            new Move(4, 3)

        };

​

        if (moves.Contains(new Move(1, 2)))

            Console.WriteLine("Contained");

​

        if (moves.Contains(new Move(2, 1)))

            Console.WriteLine("Contained");

    }

​

    class Move

    {

        public Move(int p1, int p2)

        {

            position1 = p1;

            position2 = p2;

        }

​

        public int position1 { get; private set; }

        public int position2 { get; private set; }

​

        public override bool Equals(object obj)

        {

            if (obj == null)

                return false;

​

            if (ReferenceEquals(this, obj))

                return true;

​

            Move other = obj as Move;

​

            if (other == null)

                return false;

​

            return (position1 == other.position1 && position2 == other.position2) ||

                   (position1 == other.position2 && position2 == other.position1);

        }

​

        public override int GetHashCode()

        {

            return position1 + position2;

        }

    }

}