private async void Initialize()
{
IsLoading = true;
var notebooks = await OneNoteManager.FetchNotebooksAsync();
Notebooks = new ObservableCollection <Notebook>(notebooks);
IsLoading = false;
}
public async void ImportNotebooksAsync()
{
var notebooks = new List <Notebook>(Notebooks);
await Task.Run(() => OneNoteManager.ImportNotebooks(notebooks));
}