[SharePoint 2010 - Developpement Informations] SPSecurity.RunWithElevatedPrivileges informations

SPSecurity.RunWithElevatedPrivileges launch the code with the administrator account of SharePoint.
Thought it could tell you during the execution : "Access denied" or :

UnauthorizedAccessException was unhandled by user code
0x80070005

Make sure you have sufficient privileges to access this resource. If you are attempting to access a file, make sure it is not readonly...

Make sure you re-open a new SPSite inside the SPSecurity.RunWithElevatedPrivileges in order to get the authorization of the administrator.

Example in a feature receiver :

   1: SPSecurity.RunWithElevatedPrivileges(delegate()

   2:             {

   3:                 using (SPSite site = new SPSite(properties.List.ParentWeb.Site.Url))

   4:                 {

   5:                     using (SPWeb web = site.OpenWeb(properties.List.ParentWeb.Url))

   6:                     {

   7:                         SPList List = properties.List;

   8:  

   9:                         try

  10:                         {

  11:                             this.EventFiringEnabled = false;

  12:                             base.ItemAdded(properties);