Question

How to block all website in webbrowser control except facebook.com??
example:

private void webBrowser1_Navigating(object sender, WebBrowserNavigatingEventArgs e)
{
   if (webBrowser1.Url.ToString() == "All site from facebook.com")
   {
   }
   else
   {
      MessageBox.Show("Site Blocked");
      webBrowser.Navigated("Http://google.com");
   }
}

Answer 1

Handle Navigating as you’re already doing, but cancel it if the URL isn’t from Facebook:

e.Cancel = !e.Url.Host.EndsWith(".facebook.com");