public ProductTypeCollection FetchByQuery(Query qry)
        {
            ProductTypeCollection coll = new ProductTypeCollection();

            coll.LoadAndCloseReader(qry.ExecuteReader());
            return(coll);
        }
        public ProductTypeCollection FetchAll()
        {
            ProductTypeCollection coll = new ProductTypeCollection();
            Query qry = new Query(ProductType.Schema);

            coll.LoadAndCloseReader(qry.ExecuteReader());
            return(coll);
        }