void RemoveAppoinments()
 {
     Schedule[] schedules = SchedulerExtension.GetAppointmentsToRemove <Schedule>("scheduler", SchedulerHelper.DataObject.Appointments,
                                                                                  SchedulerHelper.DataObject.Resources, SchedulerHelper.AppointmentStorage, SchedulerHelper.ResourceStorage);
     foreach (var schedule in schedules)
     {
         SchedulingDBDataProvider.DeleteCarScheduling(schedule);
     }
 }
 void UpdateAppointments()
 {
     Schedule[] schedules = SchedulerExtension.GetAppointmentsToUpdate <Schedule>("scheduler", SchedulerHelper.DataObject.Appointments,
                                                                                  SchedulerHelper.DataObject.Resources, SchedulerHelper.AppointmentStorage, SchedulerHelper.ResourceStorage);
     foreach (var schedule in schedules)
     {
         SchedulingDBDataProvider.UpdateSchedule(schedule);
     }
 }