private async void Handle_Clicked(object sender, System.EventArgs e)
 {
     MainImageViewModel viewModel = this.BindingContext as MainImageViewModel;
     await Navigation.PushAsync(new ListViewCollectionCheck(viewModel?.list));
 }
 public CourasalPage1()
 {
     InitializeComponent();
     BindingContext = new MainImageViewModel();
 }
 public MainPage()
 {
     InitializeComponent();
     BindingContext = new MainImageViewModel();
 }