private void detach_ORDERs(ORDER entity)
 {
     this.SendPropertyChanging();
     entity.CUSTOMER = null;
 }
 private void attach_ORDERs(ORDER entity)
 {
     this.SendPropertyChanging();
     entity.CUSTOMER = this;
 }
 partial void UpdateORDER(ORDER instance);
 partial void DeleteORDER(ORDER instance);
 partial void InsertORDER(ORDER instance);