Load local resources (css, js, images) to WebView Source in Xamarin

I'm using Xamarin WebView to display some local html pages that are located under (FileSystem.AppDataDirectory) that is "C:/Users/nameUser/AppData/Local/Packages/....../LocalState/folder/file.html"
Under folder directory, beside the .html file there are other resources like .js and .css, and images.
I'm able to load html using a StreamReader and put the html code in a variable but I can't load the resource.

string html = "";
HtmlWebViewSource source = new HtmlWebViewSource();

string filePath = Path.Combine(folderPath, "index.html"); <br>
using (var sr = new StreamReader(filePath))<br>
{ <br>
     html = sr.ReadToEnd(); <br>
}<br>
source.Html = @html; <br>
source.BaseUrl = folderPath; //path that contains css and js resources <br> 
webView.Source = source;

So I'm able to view the Html code but I can't load the resources. Is there a way to solve this issues?