要在用户到达ScrollView的列表项的下端时检测它的末尾，可以使用下面的代码来实现：

XAML：

<ScrollView  Scrolled="OnScrollViewScrolled"> 
     <StackLayout BindableLayout.ItemsSource="{x:Static local:NamedColor.All}">
           <!--Omitted for breviety-->
      </StackLayout>
</ScrollView>

代码隐藏：

private void OnScrollViewScrolled(object sender, ScrolledEventArgs e) 
{

      if (!(sender is ScrollView scrollView)) return;

      var scrollSpace =  scrollView.ContentSize.Height - scrollView.Height;

      if (scrollSpace > e.ScrollY) return;
      

      //load more items when coming to the end of the list of ScrollView 
      System.Diagnostics.Debug.WriteLine("Load more items");
}