Refer to this link.
Events in Master page / Content Pages[
^]
It states that,When an end user requests a content page in the browser, the event ordering is as follows:
Master page child controls initialization: All server controls contained within the master page are first initialized.
Content page child controls initialization: All server controls contained in the content page are initialized.
Master page initialization: The master page itself is initialized.
Content page initialization: The content page is initialized.
Content page load: The content page is loaded (this is the Page_Load event followed by the Page_LoadComplete event).
Master page load: The master page is loaded (this is also the Page_Load event).
Master page child controls load: The server controls on the master page are loaded onto the page.
Content page child controls load: The server controls on the content page are loaded onto the page.
This can also be useful.
Events in ASP.NET Master and Content Pages[
^]
Regards..:laugh: