[C#] 取得 URL 頁面上的 title 內容

//using System.Net;
//using System.IO;
//using System.Text;

string url = @"http://msdn.microsoft.com/en-us/library/az24scfc.aspx";
string title = String.Empty;

WebResponse response = null;
WebRequest request = WebRequest.Create(url);

/*設定最長執行的毫秒數*/
request.Timeout = 10000; 

try{
    /*取得 URL 頁面資料*/
    response = request.GetResponse();
    StreamReader stream = new StreamReader(
        response.GetResponseStream(), Encoding.UTF8
    );

    /*只取得前 4096 個字*/
    char[] buf = new char[4096];
    stream.Read(buf, 0, buf.Length);

    /*尋找標題字串*/
    string pageText = new String(buf);
    string pattern = @"(?<=<title[^>]*>)([^<]*)(?=</title>)";
    title = Regex.Match(pageText, pattern, RegexOptions.IgnoreCase)
            .Value.Trim();

}catch(WebException e){
}finally{
    if(response!=null){ response.Close(); }
}

title.Dump();