private void detach_ArticleCategoryMappings(ArticleCategoryMapping entity)
 {
     this.SendPropertyChanging();
     entity.Category = null;
 }
 private void attach_ArticleCategoryMappings(ArticleCategoryMapping entity)
 {
     this.SendPropertyChanging();
     entity.Article = this;
 }
 partial void UpdateArticleCategoryMapping(ArticleCategoryMapping instance);
 partial void DeleteArticleCategoryMapping(ArticleCategoryMapping instance);
 partial void InsertArticleCategoryMapping(ArticleCategoryMapping instance);