title: WebView.Navigate only shows white screen
body: <p>WebView.Navigate(URI) doesn't load the html file my uri points to. 
  PathToIndex is from <code>StorageFile.Path</code>.</p>
  
  <pre><code>private static readonly Uri HomeUri = new Uri("ms-appx-web:///" + PathToIndex, UriKind.Absolute);
  </code></pre>
  
  <p>The html I want to load is from a Zip File I've unpacked before. <br>
  Any suggestions?</p>
  
  <p>EDIT to Jogy's answer:
  Here is where i unpacked the zip file:</p>
  
  <pre><code>var localFolder = Windows.Storage.ApplicationData.Current.LocalFolder;
  var unpackFolder = await localFolder.CreateFolderAsync(appName+"unzip", CreationCollisionOption.ReplaceExisting);
  </code></pre>
  
  <p>then i save the index.html Path with <code>StorageFile.Path</code>.<br>
  I tried ms-appdata, but I get <code>value does not fall within the expected range</code> exception<br>
  I can iterate through all Files with</p>
  
  <pre><code>var files = await unpackFolder.GetFilesAsync();
  foreach(var file in files)
  {
     string name = file.Path;
  }
  </code></pre>
  
  <p><br><strong>with NavigateToString i can see the Html File too, but javascript and css still doesn't work.</strong></p>