title: Check if a file URI is HTML or not in the WebClient class
body: <p>I am downloading a file with the WebClient class, but sometimes the file returns as HTML (I can't do anything about this) What I would like to do is check whether the content is HTML or not using the WebClient class, my code is as follows:</p>
  
  <pre><code>client.DownloadFile(downloadURL, "downloadedfile.zip");
  </code></pre>