LINQ中的实体附件问题

var customer = context.Customers
                      .Include(c => c.Orders)
                      .FirstOrDefault(c => c.CustomerID == 1);

context.Entry(customer)
       .Collection(c => c.Orders)
       .Load();

var customers = context.Customers
                       .Select(c => new
                       {
                           Customer = c,
                           Orders = c.Orders
                       })
                       .ToList();