The ComputedMaxDate and ComputedMinDate are read-only properties that expose resolved DateTime values from the minimum and maximum properties of the ValueConstraint and is meant to be used from within the template of the editor. The default template contains a XamMonthCalendar that uses these properties to control its MinDate and MaxDate.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, 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