var th = new Thread(() =>
            {
                using (var br = new WebBrowser())
                {
                    br.DocumentCompleted += browser_DocumentCompleted;

                    br.ScriptErrorsSuppressed = true;
                    br.ScrollBarsEnabled = true;
                    br.AllowNavigation = true;

                    br.Navigate(urltoRun);
                    Application.Run();
                }
            });
            th.SetApartmentState(ApartmentState.STA);
            th.Start();
            th.Join(60000);
            th = null;

private void browser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
    {
        if (!string.IsNullOrEmpty(htmlResult))
            return;
    // DO SOMETHING...
    }