Specifies whether to display the appointment for which the event is raised.
true, to display the appointment; otherwise, false.
The Appointment property returns the appointment for which the event is raised. Set the Visible property to false to hide this appointment.
If the appointment is hidden by the SchedulerControl.AppointmentFilterCriteria or SchedulerControl.AppointmentFilterString property, the Visible property returns false. Set the Visible property to true to override the filter criteria/expression.