protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);
            // Set our view from the "main" layout resource
            SetContentView(Resource.Layout.Main);
            repo = ClientesApp.Repositorio;
            repo.Inicializar();
            // Get our button from the layout resource,
            // and attach an event to it
            btnRegistrar = FindViewById <Button> (Resource.Id.btnRegistrar);
            lista        = (ListView)FindViewById(Resource.Id.lstClientes);

            //var clientes = repo.leerClientes();


            //var adapter = new AdapterClientes(this, clientes);
            //lista.Adapter = adapter;

            lista.ItemClick    += Lista_ItemClick;
            btnRegistrar.Click += BtnRegistrar_Click;
        }