public void RemoveAppointment(int appointmentId)
{
lock (_lockingObject)
{
_persistable.RemoveAppointment(appointmentId);
Appointment appointment = _appointments.Find(appointment1 => appointment1.Id == appointmentId);
_updateAppointmentNotification.AppointmentDeletedNotification(appointment);
_appointments.Remove(appointment);
}
AppointmentsChangedEventHandler?.Invoke(appointmentId, EventArgs.Empty);
}