I tried this:

```
 public string GetLogoutUrl()
        {
            return String.Format("https://www.facebook.com/logout.php?next=http%3A%2F%2Fwww.google.com.br&access_token={0}", result.AccessToken);
        }

```

then:

```
webBrowser.Navigate(GetLogoutUrl());

```

Not worked. The user is redirected to facebook home page and not do logout.

how I do this? Thanks in advance.