using System;

using System.Collections.Generic;

public class Program

{

    public class DTO1

    {

        public int[] Added { get; }

        public DTO1(int[] added)

        {

            Added = added;

        }

        public override bool Equals(object obj)

        {

            return obj is DTO1 other &&

                   EqualityComparer<int[]>.Default.Equals(Added, other.Added);

        }

        public override int GetHashCode()

        {

            return HashCode.Combine(Added);

        }

    }

    public class DTO2

    {

        public int[] Added { get; }

        public DTO2(int[] added)

        {

            Added = added;

        }

    }

    public static void Main()

    {

        var eq1 = new DTO1(new int[]{1,2,3}) == new DTO1(new int[]{1,2,3});

        var eq3 = new DTO1(new int[]{1,2,3}).Equals(new DTO1(new int[]{1,2,3}));

        var eq2 = new DTO2(new int[]{1,2,3}) == new DTO2(new int[]{1,2,3});

        Console.WriteLine($"eq1: {eq1}, eq2: {eq2}, eq3: {eq3}");

    }

}