C# 急于加载嵌套实体

我将以下内容保持得非常简单：

public class Customer
{
    public int Id {get; set}
    public IEnumerable<Reminder> Reminders {get; set}
    public IEnumerable<Order> Orders {get; set}
}

public class Reminder
{
    public int CustomerId {get; set}
    public string Text {get; set}
}

public class Order
{
    public int CustomerId {get; set}
    public int CategoryId {get; set}
}

public class OrderDetails
{
    public int OrderId {get; set}
    public int ProductId {get; set}
}

但是上面提到的一切。如果我执行以下操作，将引发异常：

var customer = customerRepository.Get(10, x => x.Reminders, x => x.Orders.Where(c => c.CategoryId == categoryId).Select(o => o.OrderDetials));

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那么，我如何才能真正只退回我需要的订单呢？

我很确定，目前EF无法做到这一点。从MSDN中注意，目前无法筛选加载的相关实体。包含将始终存在于所有相关实体中。来源：加载客户后，如何仅检索我需要的订单，因为一旦检索到客户，订单集合将为空。

var customer = customerRepository.Get(10, x => x.Reminders, x => x.Orders.Select(o => o.OrderDetails));

var customer = customerRepository.Get(10, x => x.Reminders, x => x.Orders.Where(c => c.CategoryId == categoryId).Select(o => o.OrderDetials));