public static void Insert(ProductQuestion question)
        {
            using (var db = OnlineStoreDbContext.Entity)
            {
                db.ProductQuestions.Add(question);

                db.SaveChanges();
            }
        }
        public static void Update(ProductQuestion productQuestion)
        {
            using (var db = OnlineStoreDbContext.Entity)
            {
                var orgQuestion = db.ProductQuestions.Where(item => item.ID == productQuestion.ID).Single();

                orgQuestion.Question       = productQuestion.Question;
                orgQuestion.Reply          = productQuestion.Reply;
                orgQuestion.QuestionStatus = productQuestion.QuestionStatus;
                orgQuestion.LastUpdate     = productQuestion.LastUpdate;
                orgQuestion.IsVisible      = productQuestion.IsVisible;

                db.SaveChanges();
            }
        }