How to extract meta tags of a series of URLs without downloading whole html in c#

I want to extract title , description and keywords of a seris of URLs
I have this code

 WebClient x = new WebClient();
 string  pageSource = (x.DownloadString(url));     
 query.title = Regex.Match(pageSource, @"<titleb[^>]*>s*(?<Title>[sS]*?)</title>", RegexOptions.IgnoreCase).Groups["Title"].Value;

But I do not want to download whole page because It is so time consuming for a series of URLs. Is there any way to get get these information without downloading whole page?
I should mention that I get these URLs in google search result page buy sending query to google.