Occurs before page initialization.
Assembly: System.Web (in System.Web.dll)
This event enables you to check conditions of the page request, such as whether the page is being loaded in response to a postback. You can also check the values of profile properties.
The event enables you to set values that are used later in the page life cycle. You can dynamically set a master page or a theme for the requested page, and create dynamic controls.
For more information about how the event fits into the ASP.NET life cycle, see ASP.NET Page Life Cycle Overview.