SharePoint University

I get an error trying to use SPSecurity.RunWithElevatedPrivileges in a webpart.

The webpart iterates through all sites, and populates an SPGridView with the result. This works fine using the System account, but when I login using Forms Authentication I get the Access Denied page, and an UnauthorizedAccessException.

I tried to use the SPSecurity.RunWithElevatedPrivileges, but I get this error:cannot convert from 'anonymous method' to 'Microsoft.SharePoint.SPSecurity.CodeToRunElevated'

The method:

(SiteHyperLink is just a small class with two properties Title and Url, and ConvertURLsToHyperLinks is a Regex.Replace method for the urls)

private ArrayList ProcessHyperLinks()
        {
            SPSecurity.RunWithElevatedPrivileges(delegate()
            {
                using (SPSite mySite = SPContext.Current.Site)
                {
                    SPWebCollection allWebs = mySite.AllWebs;
                    ArrayList returnArrayList = new ArrayList();
                    foreach (SPWeb subWeb in allWebs)
                    {
                        SiteHyperLink sh = new SiteHyperLink(
                        subWeb.Title, ConvertURLsToHyperLinks(subWeb.Url));
                        returnArrayList.Add(sh);
                    }
                    return returnArrayList;
                }
            });
        }

Seems I can't do it like this. Any ideas or solutions would be appreciated very much.