无法在efcore中获取嵌套表

using Microsoft.EntityFrameworkCore;

// 定义实体类
public class Order
{
    public int OrderId { get; set; }
    public string OrderNumber { get; set; }
    public List<OrderDetail> OrderDetails { get; set; }
}

public class OrderDetail
{
    public int OrderDetailId { get; set; }
    public int OrderId { get; set; }
    public string ProductName { get; set; }
    public decimal Price { get; set; }
}

// 定义 DbContext 类
public class AppDbContext : DbContext
{
    public DbSet<Order> Orders { get; set; }
    public DbSet<OrderDetail> OrderDetails { get; set; }

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
        // 配置数据库连接字符串等
    }
}

// 在查询时加载嵌套表数据
using (var context = new AppDbContext())
{
    var orders = context.Orders.Include(o => o.OrderDetails).ToList();
    // 处理查询结果
}