public MainView()
        {
            InitializeComponent();

            Consumo consumo = new Consumo();

            DataContext = new ConsumoViewModel(consumo);
        }
        public MainWindow()
        {
            InitializeComponent();
            //DBHelper.EstablishConnection();

            Main.Content = new MainView();
            Consumo consumo = new Consumo();

            DataContext = new ConsumoViewModel(consumo);
        }