using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public class TestObj

    {

        public List<string> Values { get; set; } = new List<string>();

    }

    public static void Main()

    {

        var obj = new TestObj();

​

        Console.WriteLine("Not Null:");

        if (obj.Values?.Any() == false)

            Console.WriteLine("there aren't any values (behaves as expected)");

        Console.WriteLine("\nNull:");

        obj.Values = null;

        if (obj.Values?.Any() == false)

            Console.WriteLine("there aren't any values");

        else

            Console.WriteLine("what's goin' on here then?!?\n\t- null != false, so the if doesn't quite work as could be expected");

    }

}