The RecurrenceId property is used during the deserialization process to identify an activity as a member of a recurrence.
When activities are deserialized from an external items source such as the Infragistics.Scheduler.DataSource.ScheduleListDataSource.AppointmentItemsSource, the value of this property is used to match modified occurrences of a recurrence with their respective root activity.
This match is made by comparing the value of this property to the value of the Id property of another activity. If the values are equal, this activity is assumed to be a member of the other activity's recurrence.
Target Platforms: Android 4.4+, iOS 8+
Development Environments: Visual Studio 2015+, Visual Studio for Mac Preview, Xamarin for Visual Studio 4.2+