How to get a rendered HTML (Processed by Javascript) C#

Question

I want to receive a rendered HTML. At the moment I am using the namespace "EO.WebBrowser" and it works for this purpose. But I always get a reminder to use a license (The license is only for commercial purposes)

So my question is: "Is there a better way without using forms?"

Reference to the same question by using forms

My current code:

    internal static string GetHtml(string url)
{
  ThreadRunner runner = new ThreadRunner();

  WebView view = runner.CreateWebView();

  runner.Send(() =>
  {
    view.LoadUrlAndWait(url);
  });

  return view.GetHtml();
}

It will be a linux service for my raspberry pi (Rasbian OS).