async void AddButtonClickedAsync(object sender, EventArgs e)
{
var editPage = new AlbumEditPage(new AlbumViewModel(null));
await Navigation.PushAsync(editPage);
}
async void EditButtonClickedAsync(object sender, EventArgs e)
{
var editPage = new AlbumEditPage(BindingContext as AlbumViewModel);
await Navigation.PushAsync(editPage);
}
