// not implemented yet
        public Boolean RemoveVacation(Vacation v)
        {
            Boolean rv = false;

            foreach (Vacation v1 in m_vacationList)
            {
                if (v.m_doctor == v1.m_doctor && v.m_startDate == v1.m_startDate && v.m_endDate == v1.m_endDate)
                {
                    m_vacationList.Remove(v1);
                    rv = true;
                    break;
                }
            }
            return(rv);
        }
        public void AddVacation(String doc, DateTime start, DateTime end)
        {
            Vacation v = new Vacation(doc, start, end);

            m_vacationList.Add(v);
        }
 public void AddVacation(Vacation v)
 {
     m_vacationList.Add(v);
 }