The Visible property is not applicable in the case where this instance is designated as the PrimaryInterval; the primary interval is always displayed.
A member of the AdditionalIntervals collection is only displayed when the duration of the cycles it generates are shorter or equal than that of the PrimaryInterval. For example, if the cycles generated by the PrimaryInterval are one hour in duration, a 15-minute TimeInterval (i.e., IntervalUnits = 'Minutes' and Interval = 15) could be present within the AdditionalIntervals collection, but it would not be displayed. The developer can force a DateTimeInterval that would otherwise be displayed to be hidden from the user by setting the Visible property to false.
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