public Nullable<DateTime> Until {get; set;}
A DateRecurrence can be limited by either a specific number of occurrences, or by a specific date, after which no occurrences will be generated.
Use the Count property to limit the maximum number of occurrences that will be generated.
Note that the Count property and the Until property are mutually exclusive; setting both properties causes undefined behavior.
Target Platforms: Android 4.4+, iOS 8+
Development Environments: Visual Studio 2015+, Visual Studio for Mac Preview, Xamarin for Visual Studio 4.2+