private async System.Threading.Tasks.Task AddTasks(TaskEditViewModel taskEditViewModel)
        {
            var page = new TaskEditPage();

            page.BindingContext = taskEditViewModel;
            await Navigation.PushAsync(page);

            NavigationPage.SetHasBackButton(page, true);
        }
        async void Handle_ItemTapped(object sender, ItemTappedEventArgs e)
        {
            if (e.Item == null)
            {
                return;
            }

            //await DisplayAlert("Item Tapped", "An item was tapped.", "OK");
            var page = new TaskEditPage();
            await Navigation.PushAsync(page);

            NavigationPage.SetHasBackButton(page, true);
            await((TaskEditViewModel)page.BindingContext).Load(((TaskView)e.Item).TaskId);
            //Deselect Item
            ((ListView)sender).SelectedItem = null;
        }