gistfile1.txt

public static class EventRegister
    {
        public static Dictionary<String, Dictionary<int,Action<object>>> Map = new Dictionary<string,Dictionary<int,Action<object>>>();
    }

SendMessage.cs

/* we are using the assumption that every entity is constructed recursively as every child component is given an id of +1

 so it could be that my id is #5, but if I have 7 child components, the ID of my next neighbor (the next entity constructed by my parent, which is on the same tree level ) will be #13, because I will be constructed recursively to the lowest level first */


public static void sendMessage(String methodName, Object args)
        {

            int id = 5;
            int parentId = 0;
            int nextNeighborId = 14;

            Dictionary<int, Action<Object>> d = EventRegister.Map[methodName];

            foreach (KeyValuePair<int, Action<Object>> kv in d)
            {
                if (kv.Key >= id && kv.Key < nextNeighborId)
                {
                    kv.Value(args);
                }
            }
        }

SomeComponent.cs

    class Handler : System.Attribute
    {
    }

    class TestClass
    {

        int id = 12;
        int parentId = 5;
        int parentNextNeighbourId = 14;

        public TestClass()
        {
            foreach (MethodInfo mi in this.GetType().GetMethods())
            {
                foreach (System.Attribute attr in mi.GetCustomAttributes(false))
                {
                    if (attr is Handler)
                    {
                        Action<object> converted = (Action<object>)Delegate.CreateDelegate(typeof(Action<object>), this, mi);

                        if (!EventRegister.Map.ContainsKey(mi.Name))
                        {
                            //EventRegister.Map[mi.Name].Add(parentId, this.demo);
                            EventRegister.Map.Add(mi.Name, new Dictionary<int, Action<object>>());
                            EventRegister.Map[mi.Name].Add(parentId, converted);
                        }
                        else
                        {
                            EventRegister.Map[mi.Name][parentId] += converted;
                        }
                    }
                }

                
            }
        }

        [Handler]
        public void demo(Object arg)
        {
            Console.Out.WriteLine("I was hit");
        }
    }

https://msmvps.com/blogs/jon_skeet/archive/2008/08/09/making-reflection-fly-and-exploring-delegates.aspx