title: UrlEncoding issue for string with ß character
body: <p>I have a parameter which I must pass as part of a url.  The parameter contains this character: ß</p>
  
  <p>When I encode this string, I am expecting this: %DF
  but instead i'm getting: %c3%9f</p>
  
  <p>Here is a line of C# which I have been using to test</p>
  
  <pre><code>  string test = HttpUtility.UrlEncode("ß");
  </code></pre>