如何使用EF在c#中使用lambda表达式进行左连接？

using System;
using System.Linq;
using System.Data.Entity;

// 定义实体类
public class Order
{
    public int OrderId { get; set; }
    public string OrderNumber { get; set; }
    public int CustomerId { get; set; }
}

public class Customer
{
    public int CustomerId { get; set; }
    public string CustomerName { get; set; }
}

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

class Program
{
    static void Main(string[] args)
    {
        using (var context = new MyDbContext())
        {
            var query = context.Orders
                .Join(context.Customers,
                    order => order.CustomerId,
                    customer => customer.CustomerId,
                    (order, customer) => new { Order = order, Customer = customer })
                .Select(o => new { o.Order.OrderId, o.Order.OrderNumber, o.Customer.CustomerName })
                .ToList();

            foreach (var result in query)
            {
                Console.WriteLine($"OrderId: {result.OrderId}, OrderNumber: {result.OrderNumber}, CustomerName: {result.CustomerName}");
            }
        }
    }
}