public TransferFileInfo[] GetTransferFile(int countryId, int beginNumber, int endNumber, string siteCode)
        {
            IScanService client = null;

            try
            {
                client = ScanServiceClient.CreateProxy(Program.SCAN_URL);
                var keys = Security.CreateInstance().GenerateSecurityKeys();
                return(client.GetTransferFile(countryId, beginNumber, endNumber, siteCode, keys.Item1, keys.Item2));
            }
            finally
            {
                ((IDisposable)client).DisposeSf();
            }
        }