using System;

using System.Linq;

using System.Collections.Generic;

using System.Threading.Tasks;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine(new List<int>() == new List<int>());

        Console.WriteLine(new List<int>{1} == new List<int>{1});

        Console.WriteLine(new List<int>{1} == new List<int>{2});

        var list = new List<int>();

        var list2 = list;

        list.Add(3);

        Console.WriteLine(list == list2);

    }

}