The GoForward method navigates the browser to the next
page in its session history, if one is available. This is equivalent to
selecting the Forward button in a standard web browser.
If there is no forward entry in the history list, the method will
succeed but no navigation will occur. The availability of forward
navigation can be determined by handling the HistoryChanged
event and checking the CanGoForward property.
Calling ClearHistory will remove the session history
for the browser instance. After the history has been cleared, calling
GoForward will have no effect until new pages have been
visited.