gistfile1.cs

[ServiceConfiguration(typeof(IContentRepositoryDescriptor))]
public class ReviewPaneDescriptor : ContentRepositoryDescriptorBase
{
    public static string RepositoryKey { get { return "reviews"; } }
    public override string Key { get { return RepositoryKey; } }
    public override string Name { get { return "Product reviews"; } }

    public override IEnumerable<Type> ContainedTypes 
    {
        get { return new [] { typeof(Review), typeof(ContentFolder) }; }
    }

    public override IEnumerable<Type> CreatableTypes
    {
        get { return new List<Type> { typeof(Review) }; }
    }

    public override IEnumerable<ContentReference> Roots
    {
        get { return new ContentReference[0]; }
    }

    public override IEnumerable<Type> MainNavigationTypes
    {
        get { return new[] { typeof(ContentFolder) }; }
    }
}