partial void Deleteintersection(intersection instance);
 partial void Updateintersection(intersection instance);
 private void detach_intersections(intersection entity)
 {
     this.SendPropertyChanging();
     entity.station = null;
 }
 partial void Insertintersection(intersection instance);
 private void attach_intersections(intersection entity)
 {
     this.SendPropertyChanging();
     entity.line = this;
 }