private static string ApplicationBackup(NippsPackage np)
        {
            string applicationFolder =
                ServerManagerHelper.PutEnvVarValue(
                    ServerManagerHelper.GetApplicationPhysicalPath(
                        np.SiteName,
                        np.ApplicationName
                        ));
            string BackupTargetPath = GetBackupTargetPath();
            string zipName          = BackupTargetPath + (np.ApplicationName.Equals("/") ? "Site_" : "Appl_") + ZipFileName(np);

            _Logger.Debug("{0}, {1}", applicationFolder, zipName);

            NippsZipHelper.ZipFolder(applicationFolder, zipName);
            return(zipName.Substring(BackupTargetPath.Length));
        }