public NoteList()
        {
            InitializeComponent();

            ToolbarItem addItem = null;
            ToolbarItem showUndoneItem = null;
            ToolbarItem showAllItem = null;
            ToolbarItem showDoneItem = null;

            addItem = new ToolbarItem("Add", "add.png", () =>
            {
                var note = new Note();
                var notePage = new NotePage();
                notePage.BindingContext = note;
                Navigation.PushAsync(notePage);
            }, ToolbarItemOrder.Primary, 0);
            showUndoneItem = new ToolbarItem("Not done notes", "plus",
                () => { listView.ItemsSource = App.Database.GetItemsNotDone(); }, ToolbarItemOrder.Secondary, 0);
            showDoneItem = new ToolbarItem("Done notes", "plus",
                () => { listView.ItemsSource = App.Database.GetItemsDone(); }, ToolbarItemOrder.Secondary, 0);
            showAllItem = new ToolbarItem("All", "plus", () => { listView.ItemsSource = App.Database.GetItems(); },
                ToolbarItemOrder.Secondary, 0);

            ToolbarItems.Add(addItem);
            ToolbarItems.Add(showUndoneItem);
            ToolbarItems.Add(showDoneItem);
            ToolbarItems.Add(showAllItem);
        }
        void listItemSelected(object sender, SelectedItemChangedEventArgs e)
        {
            var note = (Note) e.SelectedItem;
            var notePage = new NotePage();
            notePage.BindingContext = note;

            ((App) App.Current).ResumeNote = note.Id;

            Navigation.PushAsync(notePage);
        }
        protected override void OnStart()
        {
            if (Properties.ContainsKey("ResumeNote"))
            {
                var resumePoint = Properties["ResumeNote"].ToString();
                if (!String.IsNullOrEmpty(resumePoint))
                {
                    ResumeNote = int.Parse(resumePoint);

                    if (ResumeNote >= 0)
                    {
                        var notePage = new NotePage();
                        notePage.BindingContext = Database.GetItem(ResumeNote);

                        MainPage.Navigation.PushAsync(notePage, false);
                    }
                }
            }
        }