如何为Xamarin Forms TemplatedView使用TemplateSelector？

public class MyTemplateSelector : DataTemplateSelector
{
    public DataTemplate Template1 { get; set; }
    public DataTemplate Template2 { get; set; }

    protected override DataTemplate OnSelectTemplate(object item, BindableObject container)
    {
        if (item is Type1)
            return Template1;
        else if (item is Type2)
            return Template2;

        return null;
    }
}

<ContentPage.Resources>
    <ResourceDictionary>
        <local:MyTemplateSelector x:Key="myTemplateSelector">
            <local:MyTemplateSelector.Template1>
                <DataTemplate>
                    <!-- 模板1的内容 -->
                </DataTemplate>
            </local:MyTemplateSelector.Template1>
            <local:MyTemplateSelector.Template2>
                <DataTemplate>
                    <!-- 模板2的内容 -->
                </DataTemplate>
            </local:MyTemplateSelector.Template2>
        </local:MyTemplateSelector>
    </ResourceDictionary>
</ContentPage.Resources>

<ContentPage>
    <StackLayout>
        <TemplatedView TemplateSelector="{StaticResource myTemplateSelector}">
            <!-- TemplatedView的内容 -->
        </TemplatedView>
    </StackLayout>
</ContentPage>