/// <summary>
        /// Funkcja do wczytywania kategorii i ich linków. Zmienia kodowanie.
        /// </summary>
        private void GetCategories()
        {
            var listTitles = new List <string>();
            var listUrls   = new List <string>();

            WebClient webClient = new WebClient();
            Encoding  enc       = Encoding.GetEncoding("ISO-8859-2");

            webClient.Encoding = enc;
            string       page = webClient.DownloadString(ResourceRss.UrlWebsite);
            HtmlDocument doc  = new HtmlDocument();

            doc.LoadHtml(page);
            var titles = from node in doc.DocumentNode.SelectNodes("//td[@class = 'tdPolecane01']")
                         select node.InnerText.ToString();


            listTitles = titles.AsQueryable().ToList();

            var urls = from node in doc.DocumentNode.SelectNodes("//td[@class = 'tdPolecane02']")
                       select node.InnerText.ToString();

            listUrls = urls.AsQueryable().ToList();

            for (int i = 0; i < listTitles.Count(); i++)
            {
                ListCategories.Add(new Category {
                    Name = listTitles[i], Url = listUrls[i]
                });
            }
        }
        /// <summary>
        /// Recharge les Categories de prix depuis la DB
        /// </summary>
        public void LoadCategories()
        {
            List <CategoryPrice> categoryPrices = CategoryPriceServices.GetAllPrice();

            ListCategories.Clear();
            foreach (CategoryPrice categoryPrice in categoryPrices)
            {
                ListCategories.Add(categoryPrice);
            }
        }