System.Threading.ThreadAbortException: Thread was being aborted.
   at System.Threading.Thread.AbortInternal()
   at System.Threading.Thread.Abort(Object stateInfo)
   at System.Web.HttpResponse.End()
   at PathMapper.Map404(String missingUrl) in d:\inetpub\wwwroot2\App_Code\PathMapper.cs:line 69
   at _404.Page_Load(Object sender, EventArgs e) in d:\inetpub\wwwroot2\404.aspx.cs:line 21