ListView inside a CarouselView... getting cast exception

I was trying to add the following to CarouselViewDemos/Views/Indicators/HorizontalLayoutWithIndicatorsPage.xaml|
```









```
and I have this in:
CarouselViewDemos/Models/Monkey.cs
```
namespace CarouselViewDemos.Models
{
public class Monkey
{
public string Name { get; set; }
public List Class { get; set; }
public string Location { get; set; }
public string Details { get; set; }
public string ImageUrl { get; set; }
public bool IsFavorite { get; set; }
}
}
```
and last... I've updated the hard-coded data like this in:
CarouselViewDemos/ViewModels/MonkeysViewModel.cs
```
source.Add(new Monkey
{
Name = "Capuchin Monkey",
Class = new List() { "A", "B" },
Location = "Central & South America",
Details = "The capuchin monkeys are New World monkeys of the subfamily Cebinae. ... a single genus, Cebus.",
ImageUrl = "https://upload.wikimedia.org/.....jpg/200px-Capuchin_Costa_Rica.jpg"
});
```
But I get a cast exception error.
Commenting out the ListView in the xaml... and things run... so I guess it is something to do with how I'm setting up the xaml???

Any ideas?