HTTPWebResponse + StreamReader Very Slow

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HttpWebRequest may be taking a while to detect your proxy settings. Try adding this to your application config:

<system.net>
  <defaultProxy enabled="false">
    <proxy/>
    <bypasslist/>
    <module/>
  </defaultProxy>
</system.net>

You might also see a slight performance gain from buffering your reads to reduce the number of calls made to the underlying operating system socket:

using (BufferedStream buffer = new BufferedStream(stream))
{
  using (StreamReader reader = new StreamReader(buffer))
  {
    pageContent = reader.ReadToEnd();
  }
}

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