public static async Task OpenDetailPage(this BaseContentPage page, string documentId, bool isSilent = false)
        {
            if (page.IsOpenning)
            {
                return;
            }

            page.ViewModel.IsLoadActivity = true;

            if (AppData.Discount.IsSynchingImages)
            {
                var isHasInternet = CrossConnectivity.Current.IsConnected;
                if (isHasInternet)
                {
                    await AppData.Discount.SyncImagesFor(documentId);
                }
            }

            DiscountDetailData discountDetailData;

            try
            {
                discountDetailData = await AppData.Discount.Db.LoadDiscountDetail(documentId);

                if (discountDetailData != null)
                {
                    page.OpenPage(new DiscountDetailPage(discountDetailData));
                }
            }
            catch (Exception ex)
            {
                LoggerHelper.WriteException(ex);

                discountDetailData = null;
            }

            page.ViewModel.IsLoadActivity = false;

            if (discountDetailData == null && !isSilent)
            {
                var discountContentUI = new DiscountContentUI();
                await page.DisplayAlert(null, discountContentUI.TitleErrLoading, discountContentUI.TxtOk);
            }
        }