private async void Delete_Click(object sender, RoutedEventArgs e)
{
IList <Note> toBeDeleted = new List <Note>();
// We have to make a temporary list of things to delete as doing so in the loop
// will invalidate the IEnumerable
foreach (Note note in this.MasterListView.SelectedItems)
{
toBeDeleted.Add(note);
}
foreach (var note in toBeDeleted)
{
await NoteManager.DeleteNoteAsync(note);
}
}