Can somebody please explain what the difference is. When will you use each? What Is the good use of IsPostback? Is this for to not loading data from database if Postback occurs to save on performance? It seems to be working for me, I only load data if not IsPostback. Is this correct? Is this because all my postbacks are generated by UpdatePanel? What is a difference between Postback generated by UpdatePanel versus regular Postback? Is the IsCallback true in this case? Should I check it instead?
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