Difference between AsyncPostBackTrigger and PostBackTrigger inside asp:updatepanel

 <Triggers>

            <asp:PostBackTrigger ControlID="btnPnlDelete" />

            <AsyncPostBackTrigger ControlID="btnPnlDelete" />

        </Triggers>

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AsyncPostBackTrigger will not refresh the page.

PostBackTrigger will refresh the page.