Friends,

I do not know why, but every time I add a ModelErrror my session is lost. Someone tell me how I can work around / fix it?

                Session[CtSessionName + SessionId] = _ListaAcaoMenuInfo;

                AcaoMenuInfoExt _SelecionadoAcaoMenuExt = _ListaAcaoMenuInfo.Where(p => p.Id_acao == id).FirstOrDefault();
                if (_SelecionadoAcaoMenuExt.Is_AcaoInicial)
                {
                    ModelState.AddModelError(String.Empty, "Error! Try Again, and Again, And Again!");
                }