public CRUDUseCases()
        {
            _courseList = new List <Course>();
            _courseDao  = new Dao.XmlFileDao("../../coursedata.xml");
            List <CourseDTO> courseDTOList = _courseDao.ListAllCourse();

            foreach (CourseDTO courseDTO in courseDTOList)
            {
                Course course = new Course(courseDTO.Name,
                                           courseDTO.Description,
                                           courseDTO.Objective,
                                           courseDTO.Price,
                                           courseDTO.Caution,
                                           courseDTO.Remarks);
                _courseList.Add(course);
            }
        }
 public CRUDUseCases()
 {
     _courseDao = new Dao.XmlFileDao("../../coursedata.xml");
 }