//Pagination
        public ActionResult Index(int page = 1)
        {
            PhotoPageInfo pageInfo = new PhotoPageInfo {
                PageNumber = page, PageSize = ImagesOnPage, Tag = string.Empty,
                TotalItems = photoService.CountByTag(string.Empty)
            };
            IEnumerable <PhotoViewModel> photos = photoService.GetAll(0, ImagesOnPage * page)
                                                  .Select(p => p.ToPhotoViewModel());

            return(View(new PaginationViewModel <PhotoViewModel> {
                PageInfo = pageInfo, Items = photos
            }));
        }