using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var foo = new Foo();

        if(10 > foo.Bar?.Count) {

            Console.WriteLine("Works");

        }

        else {

            Console.WriteLine("Doesn't work");

        }

    }

    public class Foo 

    {

        public List<string> Bar = null;

    }

}