public AddStudentUserControl()
{
InitializeComponent();
this.Rooms.ItemsSource = RoomService.GetRoomsByCampus(campus).Select(r => r.Number);
this.University.ItemsSource = GeneralService.GetUniversities().Select(u => u.Name);
this.Town.ItemsSource = TownService.GetTowns().Select(t => t.Name);
}