XmppCon.RosterManager.RemoveRosterItem(node.RosterItem.Jid);

        void userConn_OnLogin(object sender)

        {

            FireShowMsg(string.Format("{0} Login", userConn.MyJID.User));

            RegisterIq rIq = new RegisterIq();

            rIq.Type = IqType.set;

            rIq.To = new Jid(userConn.Server);

            rIq.Query.RemoveAccount = true;

            userConn.IqGrabber.SendIq(rIq, new IqCB(OnRemoveAccountResult));

        }

        void OnRemoveAccountResult(object sender, IQ iq, object data)

        {

            userConn.Close();

            FireShowMsg(string.Format("Remove Account:{0} OK",userConn.MyJID.User));

        }