c# webbrowser control, navigates on dynamic menu hover?

I have a form in my winforms app that acts as a built-in browser. It uses the .net webbrowser control. Pretty simple. I have a textbox as an address bar, and buttons for control. When I navigate to my website, my website uses a .net menu control to present a hover menu. When I hover over the menu (using my browser form), the address bar changes to: http://domainname/WebResource.axd?etc/etc/etc, unexpectedly

I am trapping the webbrowser_navigating event and setting the Text property of the address bar to e.Url.ToString()

Of course, this is not the expected result, and IE doesn't do this. What am I missing?

UPDATE:

Here's the only way I could come up with how to do this:

                string url = e.Url.ToString().ToLower();

                // Only change the address bar under certain circumstances
                // Filter out some navigating changes
                if ((StringUtil.Empty(e.TargetFrameName) || e.TargetFrameName.ToLower() == "_blank") &&
                    !url.Contains("webresource.axd") &&
  开发者_如何学Python                  !url.Contains("javascript:") &&
                    !url.Contains("about:blank"))
                {
                    toolStripAddress.Text = e.Url.ToString();
                }

See Sanjay's comment above.