class EventDispatcher
{
    private static Dictionary<string, List<IPlugin>> observers = 
        new Dictionary<string, List<IPlugin>>();

    public static void Dispatch(string eventName, string obj) 
    {
        foreach(IPlugin plugin in observers[eventName])
        {
            plugin.Run(obj);
        }
    }
    
}


class Chrome
{
    public string CurrentUrl {set; get;}
    public void LoadPage()
    {
        EventDispatcher.Dispatch("page.loaded", this.CurrentUrl);    
    }
}

interface IPlugin
{
    void Run(string somethin);
}

class AdBlock : IPlugin
{
    public void Run(string somethin)
    {
        Console.WriteLine("now I can try to detect advertisement on the page: " + something);
    }
}

EventDispatcher.Connect("page.loaded", new AdBlock());

Chrome chrome = new Chrome();
chrome.CurrentUrl = "http://google.com";
chrome.LoadPage();