using System;

​

public class Program

{

    public static void SubscribeToTrigger(ref Action trigger) {

        trigger += () => Console.WriteLine("The light of day shines upon me aswell :)");

    }

    public static void Main()

    {

        Action trigger = () => Console.WriteLine("The light of day shines upon me");

        SubscribeToTrigger(ref trigger);

        trigger.Invoke();

    }

}