the web is stateless, therefore anything built on top of http is stateless. by stateless I mean each request/response is an atomic unit with no knowledge of any previous request.
there are mechanisms with http that allow you to hold some form of state between requests like Session and Application, but generally, these should be used as little as possible.
Webforms attempts to create the illusion of state by introducing ViewState and Postback. But this doesn't change the fact that the web is stateless.
