public ConcursoDTO ObterUltimoConcurso() { try { List <Concurso> concursos = new List <Concurso>(); string token = Authenticar(); NameValueCollection header = new NameValueCollection(); header.Add("A-Token", token); string concursosJson = new HttpUtility().SendHttpWebRequest("", HttpUtility.HttpVerbEnum.Get, HttpUtility.HttpContentTypeEnum.Json, _wsloteria_url + $"megasena/last/1", header); List <ConcursoDTO> dtos = new HttpUtility() .JsonToObjectDeserialize <List <ConcursoDTO> >(concursosJson); return(dtos.FirstOrDefault()); } catch (Exception ex) { throw new InvalidOperationException("Falha ao carregar o concurso do serviços da megasena", ex); } }