public MainPageViewModel(INavigation navigation)
{
//Model→ViewModel
this.Label1 = model.ObserveProperty(x => x.Name).ToReactiveProperty();
//Button
Button1.Subscribe(x => model.NamePlus(x));
Button2.Subscribe(x => model.NamePlus(x));
Button3.Subscribe(x => model.NamePlus(x));
Button4.Subscribe(x => model.NamePlus(x));
Button5.Subscribe(x => model.NamePlus(x));
//Button(ページ遷移)
NextPageButton.Subscribe(async _ => await navigation.PushAsync(new Views.NextPageView()));
}