ASP.NET2.0中配置文件的加密与解密

private void protectsection(string sectionname, string provider)
    {
        configuration config =
            webconfigurationmanager.
                openwebconfiguration(request.applicationpath);

        configurationsection section = config.getsection(sectionname);

        if (section != null && !section.sectioninformation.isprotected)
        {
            section.sectioninformation.protectsection(provider);
            config.save();
        }
    }

 private void unprotectsection(string sectionname)
    {
        configuration config =
            webconfigurationmanager.
                openwebconfiguration(request.applicationpath);

        configurationsection section = config.getsection(sectionname);

        if (section != null && section.sectioninformation.isprotected)
        {
            section.sectioninformation.unprotectsection();
            config.save();
        }
    }