private void detach_TimeTable(TimeTable entity)
 {
     this.SendPropertyChanging();
     entity.Type = null;
 }
 private void attach_TimeTable(TimeTable entity)
 {
     this.SendPropertyChanging();
     entity.Type = this;
 }
 partial void UpdateTimeTable(TimeTable instance);
 partial void DeleteTimeTable(TimeTable instance);
 partial void InsertTimeTable(TimeTable instance);