using System;

​

namespace ConsoleApp1

{

    public class Program

    {

        public static void Main()

        {

            Foo foo = null;

            if (foo?.x != 0)

            {

                Console.WriteLine("!! ez itt mi??");

            }

​

            Console.WriteLine("Hello World");

        }

    }

​

    public class Foo

    {

        public int x;

    }

}