is there a wrong of GridView(version4.0) source Code????

 private bool HandleDeleteCallback(int affectedRows, Exception ex)
        {
            GridViewDeletedEventArgs sea = new GridViewDeletedEventArgs(affectedRows, ex);
            sea.SetKeys(_deleteKeys);
            sea.SetValues(_deleteValues);
            OnRowDeleted(sea);
            _deleteKeys = null;
            _deleteValues = null;
            if (ex != null && !sea.ExceptionHandled)
            {
        ...