如何在EntityFrameworkCore InMemory中包含对象属性

public class Order
{
    public int Id { get; set; }
    public string OrderNumber { get; set; }
    public Customer Customer { get; set; }
}

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

public class OrderContext : DbContext
{
    public DbSet<Order> Orders { get; set; }
    public DbSet<Customer> Customers { get; set; }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.Entity<Order>()
            .HasOne(o => o.Customer)
            .WithMany()
            .HasForeignKey(o => o.CustomerId);
    }
}

services.AddDbContext<OrderContext>(options =>
    options.UseInMemoryDatabase(databaseName: "InMemoryDatabase"));

var options = new DbContextOptionsBuilder<OrderContext>()
    .UseInMemoryDatabase(databaseName: "InMemoryDatabase")
    .Options;

using (var context = new OrderContext(options))
{
    var customer = new Customer { Id = 1, Name = "John Doe" };
    var order = new Order { Id = 1, OrderNumber = "12345", Customer = customer };

    context.Customers.Add(customer);
    context.Orders.Add(order);
    context.SaveChanges();
}

using (var context = new OrderContext(options))
{
    var orders = context.Orders.Include(o => o.Customer).ToList();
    foreach (var order in orders)
    {
        Console.WriteLine($"Order Number: {order.OrderNumber}, Customer Name: {order.Customer.Name}");
    }
}