ASP.NET / C# : Look for phrase using remote web request

Using ASP.NET/C#, how can I test if a remote website contains a specified phrase?  This does NOT work:

  String strResult;
  WebResponse objResponse;
  WebRequest objRequest = HttpWebRequest.Create("http://www.example.com/");
  objResponse = objRequest.GetResponse();
  using (StreamReader sr = new StreamReader(objResponse.GetResponseStream()))
  {
    strResult = sr.ReadToEnd();
    Print(strResult);
    sr.Close();
  }
  if( strResult contains "illustrative examples") {
    Console.WriteLine("Phrase Found");
  }
  else {
    Console.WriteLine("Phrase Not Found");
  }

Select allOpen in new window