public Status addFeedBack(FeedBack feedback)
        {
            var status = Status.Success;

            try
            {
                var existFeedback = feedBackService.GetFeedbackByID(feedback.FeedbackId);
                if (existFeedback != null)
                {
                    status = Status.ExistError;
                }
                else
                {
                    feedBackService.AddFeedback(feedback);
                }
            }
            catch (Exception)
            {
                status = Status.DBError;
            }
            return(status);
        }