protected override void PageLoaded()
        {
            base.PageLoaded();

            PlaceOfInterestCategories.Clear();
            PlaceOfInterestCategories.AddRange(unitOfWork.PlaceOfInterestCategoryRepository.GetAll());
        }
        protected override void PageUnloaded()
        {
            base.PageUnloaded();

            PlaceOfInterestCategories.Clear();
        }