protected function getInfoPart()
    {
        $part = '{\info'."\r\n";

        foreach ($this->_properties as $key => $value) {
            $value = PHPRtfLite_Utf8::getUnicodeEntities($value, $this->_charset);
            $part .= '{\\' . $key . ' ' . $value . '}'."\r\n";
        }

        $part .= '}'."\r\n";

        return $part;
    }