Escondendo o título NavigationPage.SetBackButtonTitle(this, ""); //Empty string as title Escondendo o botão de voltar NavigationPage.SetHasBackButton(this, false); Fonte:https://stackoverflow.com/questions/32600713/xamarin-forms-how-to-hide-back-button-title?rq=1
O listview abaixo vai receber a lista vinda de uma consulta do sqlite e o orderby irá fazer a ordenação pela data de cada objeto. listview.ItemsSource = Itens.OrderBy(c => Convert.ToDateTime(c.Data));
The reason this wasn't working was due to be omitting the call to InitializeComponent (); in the App constructor which is required when creating the App.xaml and associated code behind. fonte: https://forums.xamarin.com/discussion/31872/application-resources-staticresource-not-found-for-key