ASP.NET Web Forms Model
 ?Page state
 Session state
 a)
 The page state is the state of the client, i.e., the content of various input fields in the 
web form.The browser submits a web form to the web server and the server returns a full markup page 
or HTML page in response.All client side user activities are forwarded to the server for stateful processing.????2.Example: shopping cart