I changed the structure of my URLs.

The pages are already indexed by Google and have the following structure:

http://mypage.com/myfolder/page.apsx

The new structure is:

http://mypage.com/page.aspx

Now all URLs that Google knows are wrong. How can I tell Google to re-index and that the structure has changed? Internally I redirect in ASP.NET when the URL contains myfolder by I want Google to update the URLs.

Thanks for the answers - I use IIS 6 and I do not know how to configure a redirect of all pages that contains the folder to page one folder below.

So I did the trick in the Begin_Request method and did a Context.Response.Redirect. This is no 301 redirect, only a redirect done with ASP.NET via code. Will this also do the trick so that Google notices that the URL /folder/page1.aspx now is redirected to /page1.aspx?