Google search in windows form c#

StringBuilder sb = new StringBuilder();

           // used on each read operation
           byte[] buf = new byte[8192];
           string GS = "http://google.com/search?q=";
           // prepare the web page we will be asking for
           HttpWebRequest request = (HttpWebRequest)WebRequest.Create(GS);

           // execute the request
           HttpWebResponse response = (HttpWebResponse)request.GetResponse();

           // we will read data via the response stream
           Stream resStream = response.GetResponseStream();
           string tempString = null;
           int count = 0;
           do
           {
               // fill the buffer with data
               count = resStream.Read(buf, 0, buf.Length);
               // make sure we read some data
               if (count != 0)
               {
                   // translate from bytes to ASCII text
                   tempString = Encoding.ASCII.GetString(buf, 0, count);

                   // continue building the string
                   sb.Append(tempString);
               }
           }
           while (count > 0);