public object Add(object item)
        {
            WebMoney webmoney = (WebMoney)item;

            /*this._db.WebMoneys.Add(webmoney);
            this._db.SaveChanges();*/
            using (BookMarketDbContext db = new BookMarketDbContext())
            {
                db.AddWebMoney(webmoney.WMR, webmoney.IndividualId);
            }
            return GetAll().webmoneys.Last();
        }