Lost Session when AddModelError

Question

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!");
                }

Answer 1

Sorry friend but thats impossible. AddModelError's code path never touches Session at all.

When you access session after the AddModelError its gone? Or are you outputting those values and they are not showing up on the screen?