Override of OnInit to handle the initialization of references for those items that have been parsed in from the aspx page. Since the items are first pushed onto a stack as they are parsed and then formed into collections later, there is no sooner opportunity to establish back references between objects and their owner/control.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2