Eager loading including navigational property of derived class

Sample class structure

class Order
{
    public int Id { get; set; }     
    public DateTime Date { get; set; }

    public List<OrderDetail> Details { get; set; }
}

class OrderDetail
{
    public int Id { get; set; }
    public int Qty { get; set; }

    public Item Item { get; set; }
}

class Item
{
    public int Id { get; set; }
    public string Name { get; set; }
}

class ElectronicItem : Item
{
    public MoreDetail Detail { get; set; }
}

class MoreDetail
{
    public int Id { get; set; }
    public string SomeData { get; set; }
}

In order to populate order object with all navigational properties, I wrote

context.Orders.Include("Details").Include("Details.Item")

I also want to load MoreDetail object, hence I tried

context.Orders.Include("Details").Include("Details.Item.Detail")

It didn't work. How to load complete Order object?

Tags: .NET, Entity Framework