public bool Transfer(string GonderenHesapNo, string AlanHesapNo, decimal Miktar)
        {
            try
            {
                Hesap GonderenHesap = null;
                Hesap AlanHesap     = null;
                using (var repo = new HesapRepository())
                {
                    GonderenHesap = repo.HesapNoSec(GonderenHesapNo);
                    if (GonderenHesap.Bakiye >= Miktar)
                    {
                        AlanHesap = repo.HesapNoSec(AlanHesapNo);

                        repo.HesapNoBakiyeGuncelle(GonderenHesapNo, GonderenHesap.Bakiye - Miktar);
                        repo.HesapNoBakiyeGuncelle(AlanHesapNo, AlanHesap.Bakiye + Miktar);
                        return(true);
                    }
                    return(false);
                }
            }
            catch (Exception ex)
            {
                throw new Exception("HesapBusiness:HesapRepository:Seçme Hatası", ex);
            }
        }
        public bool BorcOde(int AboneNo, string HesapNo)
        {
            var repo2 = new HesapRepository();

            try
            {
                using (var repo = new OdemeRepository())
                {
                    Odeme o      = repo.AboneNoSec(AboneNo);
                    Hesap h      = repo2.HesapNoSec(HesapNo);
                    var   bakiye = h.Bakiye;
                    var   borc   = o.Borc;
                    if (borc > 0 && borc <= bakiye)
                    {
                        bakiye -= borc;
                        borc    = 0;
                        repo2.HesapBakiyeGuncelle(h.HesapID, bakiye);
                        repo.BorcOde(AboneNo);

                        return(true);
                    }
                }
                return(false);
            }
            catch (Exception ex)
            {
                throw new Exception("OdemeBusiness:OdemeRepository:Ödeme Hatası", ex);
            }
        }