... I think the innovation here is really about how we integrated this into the page lifecycle. This integration stems from our fundamental requirement, which is so fundamental in fact, that as far as I recall, it has remained unspoken for the most part. The requirement is to allow the page developer to remain oblivious of the callbacks. It is the responsibility of the framework and server control developers to make magic happen. First and foremost this implies that the page developer continues to write a single page and that secondly, they continue to write code in event handlers...