partial void DeleteCatParts(CatParts instance);
 partial void UpdateCatParts(CatParts instance);
		private void detach_CatParts(CatParts entity)
		{
			this.SendPropertyChanging();
			entity.Categories = null;
		}
 partial void InsertCatParts(CatParts instance);
		private void attach_CatParts(CatParts entity)
		{
			this.SendPropertyChanging();
			entity.Categories = this;
		}