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;
}