public static SPListItem GetItemById(string listname, int itemId)
        {
            String siteUrl = "http://sp:5872";
            SPSite spSite = new SPSite(siteUrl);
            SPList list = spSite.RootWeb.Lists[listname];
            SPListItem item = null;
            try
            {
                // init
                if (listname == null) { throw new Exception("SPList passed is null"); }
                item = list.GetItemById(itemId);
            }
            catch (Exception ex)
            {
                throw ex;
            }
            return item;
        }