private void Model_PropertyChanged(object sender, PropertyChangedEventArgs e) {
if (e.PropertyName != nameof(Model.CurrentPreviewImage)) return;
(_state == 0 ? BackgroundImage1 : BackgroundImage0).Source = UriToCachedImageConverter.Convert(Model.CurrentPreviewImage);
VisualStateManager.GoToElementState(BackgroundImage1, @"State" + _state, true);
_state = 1 - _state;
}