using System;

using System.Threading;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(Math.Round( 0.2, 0, MidpointRounding.AwayFromZero ));

    }

}

​

public static class GameEvents{

    public delegate void NPCSpawned(int id);

    public static event NPCSpawned OnNPCSpawned;

    public static void Annouce_NPCSpawn(int id) => OnNPCSpawned.Invoke(id);

    }

​

// Subscribe to event

public class StaffManager {

    public void HandleNPCSpawn(int id)

    {

        Console.WriteLine("Handling new npc with an ID of " + id);

    }

    public StaffManager()

    {

        GameEvents.OnNPCSpawned += HandleNPCSpawn;

    }

}

​

// Trigger event

public class NPCManager {

    public NPCManager()

    {

        GameEvents.Annouce_NPCSpawn(10);

        Thread.Sleep(5000);

        GameEvents.Annouce_NPCSpawn(99);

    }

}