public ListofItems()
 {
     logicsData = Logics.Instance;
     this.InitializeComponent();
     allItemsListView.ItemsSource = logicsData.GetAllLibraryItems();
     HideOption();
 }
        private async void deleteBtn_Click(object sender, RoutedEventArgs e)
        {
            if (allItemsListView.SelectedItem != null)
            {
                MessageDialog msg = new MessageDialog("Are you sure to delete this item?");
                msg.Commands.Add(new UICommand("Yes"));
                msg.Commands.Add(new UICommand("No"));

                IUICommand selectedCommand = await msg.ShowAsync();

                if (selectedCommand.Label == "Yes")
                {
                    logicsData.SelectedItem = (AbstractItem)allItemsListView.SelectedItem;
                    logicsData.removeItem((AbstractItem)allItemsListView.SelectedItem);
                    allItemsListView.ItemsSource = logicsData.GetAllLibraryItems();
                }
            }
            else
            {
                await new MessageDialog("Please select an item to delete!", "No item selected").ShowAsync();
            }
        }