private PictureViewModel()
        {
            AddLink = new Command.AddPictureLinkCommand(AddPicture);
            AddFile = new Command.AddPictureFileCommand(AddPicture);
            DropFile = new Command.DropPictureFileCommand(AddPicture);
            Delete = new Command.DeletePictureCommand(RemovePicture);

            LoadData();
        }
        private PictureViewModel()
        {
            AddLink  = new Command.AddPictureLinkCommand(AddPicture);
            AddFile  = new Command.AddPictureFileCommand(AddPicture);
            DropFile = new Command.DropPictureFileCommand(AddPicture);
            Delete   = new Command.DeletePictureCommand(RemovePicture);

            LoadData();
        }