My English is poor. Sorry...
I have 3 or more user controls. etc. UC1, UC2, UC3...
And I am adding user controls as dynamically to Page.
I want to communicate between these user controls. But as synchronous or maybe asynchronous.
First; I will choose a item from a DropDownList in UC1.
Second; UC2 will detect this choosen item in UC1. And will work on this item. When it's done, It will send data to UC3.
Third; UC3 will detect sended data from UC2. And will work on this data.
Thanks...