private void detach_Item_xItemCategories(Item_xItemCategory entity)
		{
			this.SendPropertyChanging();
			entity.Item = null;
		}
 partial void DeleteItem_xItemCategory(Item_xItemCategory instance);
 partial void InsertItem_xItemCategory(Item_xItemCategory instance);
 partial void UpdateItem_xItemCategory(Item_xItemCategory instance);
		private void attach_Item_xItemCategories(Item_xItemCategory entity)
		{
			this.SendPropertyChanging();
			entity.ItemCategory = this;
		}