SimplezNo.cs

    public class EventRouter
    {
        private readonly Dictionary<Type, Action<object>> _handlers;
 
        public EventRouter()
        {
            _handlers = new Dictionary<Type, Action<object>>();
        }
 
        public void Register<T>(Action<T> handler)
        {
            if (handler == null)
                throw new ArgumentNullException("handler");
            _handlers.Add(typeof(T), _ => handler((T)_));
        }
 
        public void Register(Type type, Action<object> handler)
        {
            if (type == null)
                throw new ArgumentNullException("type");
            if (handler == null)
                throw new ArgumentNullException("handler");
 
            _handlers.Add(type, handler);
        }
 
        public void Route(object @event)
        {
            if (@event == null)
                throw new ArgumentNullException("event");
 
            Action<object> handler;
            if (_handlers.TryGetValue(@event.GetType(), out handler))
            {
                handler(@event);
            }
        }
    }