protected void rptMailler_ItemCommand(object source, RepeaterCommandEventArgs e)
        {
            if (e.CommandName == "Sil")
            {
                _mailController.DeleteEntity(new Mail {
                    MailID = Convert.ToInt32(e.CommandArgument)
                });

                Response.Redirect("~/MusteriDetay.aspx?MusteriID=" + _musteri.MusteriID);
            }
        }