Why Viewstate can contain only serializable object?

Question

I have a simple class with some properties and other data. Untill i stick serializable attribute to the class, i cannot save the object of the class into the viewstate.

Answer 1

I think this summarizes the answer: The state goes out of control from ther Asp.Net code to the HTTP handler which does not understand your code which will go out of scope, and must serialize it in a datastore (it's that lot of garbage you see when you view the source of a asp.net page) then give it back when another postback requires it.