title: System.Uri raise an exception when connect to a website
body: <p>This code raise an UriFormatException when I execute it:</p>
  
  <pre><code>try
  {
      var _client = new HttpClient();
      var s = await _client.GetStringAsync(new Uri("http://emojiapp.96.lt/"));
      EmojiList = new ObservableCollection&lt;Emoji&gt;
            (FetchLinksFromSource(s).Select(uri =&gt; new Emoji()
            {
                 Image = new BitmapImage(uri)
            }));
  }
  catch
  {
      throw;
  }
  </code></pre>
  
  <p>All web adress I've tried raises the same exception. I run this code under VS2015 in a Uwp project with lastest .Net core nuget package. this is the detailed stacktrace:</p>
  
  <p>L'exception System.UriFormatException n'a pas été gérée par le code utilisateur</p>
  
  <pre><code>HResult=-2146233033
  Message=Invalid URI: The format of the URI could not be determined.
  Source=System.Private.Uri
  StackTrace:
       at System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind)
       at System.Uri..ctor(String uriString)
       at Emoji.MainPage.FetchLinksFromSource(String htmlSource)
       at Emoji.MainPage.&lt;OnNavigatedTo&gt;d__6.MoveNext()
  InnerException: 
  </code></pre>