title: WebClient.DownloadString results in mangled characters due to encoding issues, but the browser is OK
body: <p>The following code:</p>
  
  <pre><code>var text = (new WebClient()).DownloadString("http://export.arxiv.org/api/query?search_query=au:Freidel_L*&amp;start=0&amp;max_results=20"));
  </code></pre>
  
  <p>results in a variable <code>text</code> that contains, among many other things, the string</p>
  
  <blockquote>
    <p>"$Îº$-Minkowski space, scalar field, and the issue of Lorentz invariance"</p>
  </blockquote>
  
  <p>However, when I visit that URL in Firefox, I get</p>
  
  <blockquote>
    <p>$κ$-Minkowski space, scalar field, and the issue of Lorentz invariance</p>
  </blockquote>
  
  <p>which is actually correct. I also tried</p>
  
  <pre><code>var data = (new WebClient()).DownloadData("http://export.arxiv.org/api/query?search_query=au:Freidel_L*&amp;start=0&amp;max_results=20");
  var text = System.Text.UTF8Encoding.Default.GetString(data);
  </code></pre>
  
  <p>but this gave the same problem.</p>
  
  <p>I'm not sure where the fault lies here. Is the feed lying about being UTF8-encoded, and the browser is smart enough to figure that out, but not <code>WebClient</code>? Is the feed properly UTF8-encoded, but <code>WebClient</code> is failing in some other way? What can I do to mitigate this?</p>