private void CheckSubject(SchoolSubject sc)
{
if (sc == null)
{
throw new ArgumentNullException("Nauczyciel musi uczyć minimum jednego przedmiotu");
}
}
public Teacher(SchoolSubject sc)
{
CheckSubject(sc);
_subjects = new HashSet <SchoolSubject> {
sc
};
}
public bool Remove(string subjectName)
{
try
{
SchoolSubject subject = _subjects.Single(x => x.Name.Equals(subjectName));
_subjects.Remove(subject);
return(true);
}
catch (System.InvalidOperationException)
{
return(false);
}
}
public bool Add(SchoolSubject subject)
{
return(_subjects.Add(subject));
}