public void addToStudents(Student t)
{
StudentIds.Add(t.StudentId);
Studenten.Add(t);
}
private void Toevoegen()
{
Studenten.Add(new Student(++newId, "New student", 201));
SelectedItem = Studenten[Studenten.Count - 1];
}
private void Toevoegen()
{
Studenten.Add(new Student("Student " + (++nummer), "2 ITF", nummer));
}