using System;

public class Program

{

    public static void Main()

    {       

        WriteResult(null);

    }

    public class MyObject

    {

        public bool ShouldWriteLine { get; set; }

    }

    private static void WriteResult(MyObject obj)

    {

        if(obj?.ShouldWriteLine == false)

            return;

        Console.WriteLine("ça passe par la et ça devrait pas");

    }

}