Gets whether the collection contains an AppointmentViewInfo object which relates to the appointment with the specified identifier.
public bool ContainsId( object appointmentId )
Public Function ContainsId( appointmentId As Object ) As Boolean
An object that is the identifier of an appointment to match the AppointmentViewInfo.Appointment property value of an item in the collection.
True, if the appointment with the specified ID is represented by its visual information in the collection; otherwise, false.