public void DeleteStudent(int id)
{
try
{
dl.DeletePerson(id);
dl.DeleteStudent(id);
dl.DeleteStudentFromAllCourses(id);
}
catch (DO.BadPersonIdCourseIDException ex)
{
throw new BO.BadStudentIdCourseIDException("Student ID and Course ID is Not exist", ex);
}
catch (DO.BadPersonIdException ex)
{
throw new BO.BadStudentIdException("Person id does not exist or he is not a student", ex);
}
}