public static ProductCategoryModel LoadCategory(int?id)
        {
            string sql = @"select * from dbo.Category where CategoryId = @Id";

            return(SqlDataAccess.LoadSingleDataById <ProductCategoryModel>(sql, id));
        }
        public static ImageModel LoadImage(int?id)
        {
            string sql = @"select * from dbo.ProductImages where Id_Product = @Id";

            return(SqlDataAccess.LoadSingleDataById <ImageModel>(sql, id));
        }