public AnuncioDetalleView()
        {
            InitializeComponent();

            var item = new Anuncio
            {
                Titulo      = "Anuncio 1",
                Descripcion = "This is an item description."
            };

            viewModel      = new AnuncioDetalleViewModel(item);
            BindingContext = viewModel;
        }
        public AnuncioDetalleView(AnuncioDetalleViewModel viewModel)
        {
            InitializeComponent();

            BindingContext = this.viewModel = viewModel;
        }