public ActionResult Login(string Nome, string Senha, string returnUrl)
        {
            ViewBag.ReturnUrl = returnUrl;
            UsuarioRepository objrep = new UsuarioRepository();
            var query = objrep.BuscarNomeSenha(Nome, Senha);

            if (ModelState.IsValid)
            {
                if (query != null)
                {
                    Session["Id"]   = query.id.ToString();
                    Session["Nome"] = query.Nome.ToString();
                    return(Redirect("/Administrativo/HomeAdm"));
                }
                else
                {
                    ViewBag.Erro = "Usuario Senha Incorreta";
                    return(RedirectToAction("Login"));
                }
            }

            return(View());
        }