private string CreateRequestSecurityCode(tbl_Orders order, string currencyCode)
        {
            StringBuilder s = new StringBuilder();

            s.Append(order.TotalAmountToPay.ToString("C"))
            .Append(currencyCode)
            .Append(order.OrderID)
            .Append(GetReferenceSite(order.O_DomainID))
            .Append(DomainService.GetSettingsValue(SettingsKey.secureTradingRedirectPassword, this.DomainID));

            return(Sha256.GetSHA256Hash(s.ToString()));
        }