This notification allows inheritors extending the base collection class to react to removals with follow-up processing.
Inheritors must call the base class implementation of this method before their own processing to ensure WebScheduleInfo (which holds a reference to this collection) can be properly informed of a change within the collection.
This method is not called in response to a Clear operation, even though a Clear is analogous to removing every item contained within the collection.
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