Gets the pattern appointment for the current appointment.
An Appointment object that is the pattern appointment or null if the current appointment is not recurring.
If an appointment is recurring (see the Appointment.IsRecurring property) it is an occurrence in the series which starts with a pattern appointment and whose characteristics are defined by that pattern. Use the RecurrencePattern property to obtain the pattern of the current appointment. A pattern appointment has the Appointment.Type property set to AppointmentType.Pattern. The recurrence information defined by the pattern appointment can be accessed via the Appointment.RecurrenceInfo property.
If the current appointment does not belong to a recurrence series, the RecurrencePattern property returns null (Nothing is Visual Basic).