protected void Page_Load(object sender, EventArgs e) { int?offerId = GetOfferId(); if (offerId.HasValue) { int attractionCount = service.GetAttractions(offerId.Value).Count(); AttractionPanel.Visible = attractionCount > 0; } if (User.Identity.IsAuthenticated) { attractionIdToReservedMap = service.GetAttractionIdToReservedMap(service.GetClientId(User.Identity.Name)); } }