This property returns a value that is one second earlier than the value returned from the EndDateTime property. This represents the date and time through which the task extends, whereas the EndDateTime property represents the first significant instant of time after the task ends. This is used primarily when displaying the task times, so that (for example) a task of exactly one day in duration shows the same start and end dates, and does not appear to span over two days.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, 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