Implement Publisher subscriber without delegate and event

Hi,

Today One guy has asked me to implement publisher and subscriber without help of delegate and event.

I have tried like this:

1. Publisher class I have created one dictionary which hold all the property and their 

2. created one class as register class whose instance is created in publisher which will register all the subscriber class.

3. created one method in publisher class where checking all the property value

but how to inform the subscriber class about this.

vikas sharma AB