public Register()
 {
     InitializeComponent();
     RegisterViewModel = App.Current.Services.GetService <RegisterViewModel>();
     DataContext       = RegisterViewModel;
     ResourceLoader    = ResourceLoader.GetForCurrentView();
     RegisterEmail.AddHandler(TappedEvent, new TappedEventHandler(ResetErrors), true);
     RegisterPassword.AddHandler(TappedEvent, new TappedEventHandler(ResetErrors), true);
     RegisterFirstname.AddHandler(TappedEvent, new TappedEventHandler(ResetErrors), true);
     RegisterLastname.AddHandler(TappedEvent, new TappedEventHandler(ResetErrors), true);
 }
        private void ResetErrors(object sender, TappedRoutedEventArgs e)
        {
            RegisterEmail.Header = ResourceLoader.GetString("RegisterEmail/Header");
            RegisterEmail.ClearValue(BorderBrushProperty);

            RegisterPassword.Header = ResourceLoader.GetString("RegisterPassword/Header");
            RegisterPassword.ClearValue(BorderBrushProperty);

            RegisterFirstname.Header = ResourceLoader.GetString("RegisterFirstname/Header");
            RegisterFirstname.ClearValue(BorderBrushProperty);

            RegisterLastname.Header = ResourceLoader.GetString("RegisterLastname/Header");
            RegisterLastname.ClearValue(BorderBrushProperty);
        }