public void TestarGeracaoDeListaDeCategoriasFilhas()
        {
            DateTime t_inicio;
            DateTime t_fim;
            TimeSpan t_diferenca;
            DateTime t_fim2;
            TimeSpan t_diferenca2;


            t_inicio = DateTime.Now;



            var bll = new BLLCategoria();
            List <List <int> > Matriz = new List <List <int> >();

            foreach (var item in bll.ToList())
            {
                var ListaDeIDs =
                    bll.ListaDeIDsFilhos(item.ID);
                ListaDeIDs.Insert(0, item.ID);
                Matriz.Add(ListaDeIDs);
            }



            t_fim       = DateTime.Now;
            t_diferenca = t_fim.Subtract(t_inicio);

            JavaScriptSerializer jss = new JavaScriptSerializer();
            string result            = jss.Serialize(Matriz);

            System.IO.StreamWriter file = new System.IO.StreamWriter("c:\\test.txt");
            file.WriteLine(result);

            file.Close();


            Assert.AreNotEqual(String.Empty, result);



            System.IO.StreamReader myFile = new System.IO.StreamReader("c:\\test.txt");
            string myString = myFile.ReadToEnd();

            myFile.Close();

            var retorno = jss.Deserialize <List <List <int> > >(myString);

            retorno.Where(a => a[0] == 8).SingleOrDefault();

            t_fim2       = DateTime.Now;
            t_diferenca2 = t_fim2.Subtract(t_fim);

            Assert.AreNotEqual(String.Empty, myString);
        }