using System;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        List<int> foo = null;

        for (int i = 0; i < foo?.Count; i++)

        {

            Console.WriteLine($"i == {i}");

        }

        Console.WriteLine($"count == {(foo?.Count == 0)}");

        foo = new List<int>();

        Console.WriteLine($"count == {(foo?.Count == 0)}");

    }

}