Post back :when we push a button it sends all the data to server and request fulfill and return html content in browserPost back are of two type : 1 - One way 2 - Two wayIn which it checks data sended by form and return its status based on request

Post back is the process the sending data get back to server for processing. Is post back property checks whether page is being loaded for first time. if it is False :means first time loaded. if it is True: means round trip to server. Postback: Postback is a event which fire when page data goes to server. IsPostBack: Ispostback is page property of bool type and it become true when page come again to browser. === PostBack: Postback is the event which sends the form data to the server. The server processes the data & sends it back to the browser. The page goes through its full life cycle & is rendered on the browser. It can be triggered by using the server controls.And the IsPostBack property of the page object may be used to check whether the page request is a postback or not. IsPostBack property is of the type Boolean.