解决0x80070005 (E_ACCESSDENIED)问题

SPSecurity.RunWithElevatedPrivileges(delegate
{
  using (SPSite site = new SPSite("http://servername"))
  {
    using (SPWeb web = site.RootWeb.Webs["webname"])
    {
      try
      {
        SPListItem itm = web.GetListItem("fileurl");
        itm.Delete();
      }
      catch (Exception ex)
      {
        Console.WriteLine(ex.Message);
      }
    }
  }
});