private async void CheckVisible_Elapsed(object sender, ElapsedEventArgs e)
{
var Visibility = DetailScroll.ScrollY + DetailScroll.Height;
if (Visibility < ShowImage.Height && !ScrollDown.IsVisible)
{
await Device.InvokeOnMainThreadAsync(async() =>
{
ScrollDown.Opacity = 0;
ScrollDown.IsVisible = true;
await ScrollDown.FadeTo(1);
});
}
else if (Visibility > ShowImage.Height && ScrollDown.IsVisible)
{
await Device.InvokeOnMainThreadAsync(async() =>
{
await ScrollDown.FadeTo(0);
ScrollDown.IsVisible = false;
});
}
}
