/// <summary> /// When on a note drag completed, remove it from the note list in the notebook. /// </summary> /// <param name="sender"></param> /// <param name="args"></param> private void NoteListView_OnDragItemsCompleted(ListViewBase sender, DragItemsCompletedEventArgs args) { Debug.WriteLine($"\n{sender}.{sender.GetHashCode()}.OnDragItemsCompleted"); if (args.DropResult != DataPackageOperation.Move) { return; } if (!((sender as ListView)?.DataContext is Notebook notebook)) { return; } Debug.WriteLine($"\tsource = {notebook}"); if (!IsDragEntered) { return; } args.Items?.Cast <Note>().ToList().ForEach(note => notebook.Notes.Remove(note)); }