using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        List<float> list = new List<float>() { 10.0f, 15.0f};

        List<float> anotherList = new List<float>() { 10.0f, 15.0f};

        Console.WriteLine(list.Equals(anotherList));

        HashSet<List<float>> hashSet1 = new HashSet<List<float>>();

        hashSet1.Add(list);

        HashSet<List<float>> hashSet2 = new HashSet<List<float>>();

        hashSet2.Add(anotherList);

        Console.WriteLine(hashSet1.SetEquals(hashSet2));

        HashSet<List<float>> anotherHashSet1 = new HashSet<List<float>>(new FloatListComparer());

        anotherHashSet1.Add(list);

        HashSet<List<float>> anotherHashSet2 = new HashSet<List<float>>();

        anotherHashSet2.Add(anotherList);

        Console.WriteLine(anotherHashSet1.SetEquals(anotherHashSet2));

        Console.WriteLine(anotherHashSet2.SetEquals(anotherHashSet1));

    }

}

​

public class FloatListComparer : EqualityComparer<List<float>>

{

    public override bool Equals(List<float> list1, List<float> list2)

    {

        return Enumerable.SequenceEqual(list1.OrderBy(t => t), list2.OrderBy(t => t));

    }

​

​

    public override int GetHashCode(List<float> s)

    {

        return base.GetHashCode();

    }

}

​