public ImageCollectionViewModel()
 {
     Images = new ObservableCollection<ImageViewModel>();
     RefreshCommand = new Command(Refresh);
     _is = new ImageService();
     ShowPreloaders();
     OnSelectionCommand = new Command<EventArgs<object>>(OnSelection);
 }
 public ImageEditorViewModel()
 {
     RotateCommand = new Command(Rotate);
     FlipHorCommand = new Command(FlipHorizontally);
     FlipVertCommand = new Command(FlipVertically);
     _is = new ImageService();
     ShowImage();
 }