/// <summary>
        /// 首页获取默认的两个砍价商品
        /// </summary>
        /// <returns></returns>
        public async Task <OperationResult <List <SimpleBargainProduct> > > GetBargainProductForIndexAsync()
        {
            var result = await BargainManager.GetBargainProductForIndex();

            return(OperationResult.FromResult(result));
        }