I've recently switched to MVC3 which is extension-less for the URL's, but Google and Bing have a wealth of links that they are crawling which no longer exist.
So I'm trying to find out if there is a way to format robots.txt (or by some other method) to tell google/bing that any link that ends in an extension isn't a valid link... Is this possible?
On pages that I'm concerned about a User having saved as a fav I'm displaying a 404 page that lists the links to take once they are redirected to the new page (I decided to not just redirect them as I don't want to maintain these forever). For Google/Bing sake I do have the canonical tag in the header.
User-agent: * Allow: / Disallow: /*.*
EDIT: I just added the 3rd line (in text above) and it APPEARS to do what I'm wanting. Allow a path, but disallow a file. Can anyone confirm this?