Rather that using
Response.Redirect("newpage.aspx"), ASP.NET 4 introduces the RedirectPermanent method.
To signal that the redirect is of a permanent nature (such as a url to a page changing permanently) you can now call:
This will issue a http response HTTP 301 (Moved Permanently) rather than the normal HTTP 302 (Found). This can potentially remove a round trip to the server.
From msdn.com: "Search engines and other user agents that recognize permanent redirects
will store the new URL that is associated with the content, which
eliminates the unnecessary round trip made by the browser for temporary