使用Entity Framework在单个方法中插入多个表上的记录

using System;
using System.Linq;

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

public class Order
{
    public int Id { get; set; }
    public DateTime OrderDate { get; set; }
    public int CustomerId { get; set; }
    public Customer Customer { get; set; }
}

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

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
        optionsBuilder.UseSqlServer("连接字符串");
    }
}

public class Program
{
    public static void Main()
    {
        using (var context = new MyDbContext())
        {
            var customer = new Customer { Name = "John Doe" };
            var order = new Order { OrderDate = DateTime.Now, Customer = customer };

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