Xamarin数据绑定-通过ItemList显示来自自定义类的数据问题

public class Item
{
    public string Name { get; set; }
    public string Description { get; set; }
}

<ListView ItemsSource="{Binding ItemList}">
    <ListView.ItemTemplate>
        <DataTemplate>
            <ViewCell>
                <StackLayout>
                    <Label Text="{Binding Name}" />
                    <Label Text="{Binding Description}" />
                </StackLayout>
            </ViewCell>
        </DataTemplate>
    </ListView.ItemTemplate>
</ListView>

public ObservableCollection<Item> ItemList { get; set; }

public MainPage()
{
    InitializeComponent();

    ItemList = new ObservableCollection<Item>();
    ItemList.Add(new Item { Name = "Item 1", Description = "Description 1" });
    ItemList.Add(new Item { Name = "Item 2", Description = "Description 2" });

    BindingContext = this;
}