static function Combine($path1, $path2)
    {
        $trimChars = '/';
        if (PATH_SEPARATOR != $trimChars)
            $trimChars .= PATH_SEPARATOR;
        
        $clean1 = System\Str::TrimRight($path1, $trimChars);
        $clean2 = System\Str::TrimLeft($path2, $trimChars);
        return join('/', array($clean1, $clean2));
    }