Getting related data in .Net Core 3.1 - sql-server

Question

I am trying to get related data from 2 tables. I am using .NET Core 3.1, EF Core, and the code-first approach. What I want is to pass a customerid (which is a foreign key in the order table) to get all the orders of that customer. I get some related output but I don't know how to get specific output.
I have commented out the .ThenInclude because it causes an error:
Lambda expression is not valid
Customer model class:
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
namespace CRUDRelationship.Models
{
public class Customer
{
[Key]
public int CustomerId { get; set; }
public string Name { get; set; }
public string Email { get; set; }
//public List<Order> Order { get; set; }
}
}
Order model class:
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
namespace CRUDRelationship.Models
{
public class Order
{
[Key]
public int OrderId { get; set; }
public int Total { get; set; }
[ForeignKey("Customer")]
public int CustomerId { get; set; }
public Customer customer { get; set; }
}
}
Interface:
using CRUDRelationship.Models;
using System.Collections.Generic;
using System.Threading.Tasks;
namespace CRUDRelationship.Data
{
public interface ICustomerData
{
List<Customer> GetCustomers();
Customer GetCustomer(int id);
Customer AddCustomer(Customer customer);
List<Order> GetOrderByCustomer(int CustomerId);
Order AddOrder(Order order);
}
}
Implementation:
using CRUDRelationship.Models;
using Microsoft.EntityFrameworkCore;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
namespace CRUDRelationship.Data
{
public class CustomerData : ICustomerData
{
private InvetoryContext _invetoryContext;
public CustomerData(InvetoryContext invetoryContext)
{
_invetoryContext = invetoryContext;
}
public Customer AddCustomer(Customer customer)
{
_invetoryContext.Customers.Add(customer);
_invetoryContext.SaveChanges();
return customer;
}
public Order AddOrder(Order order)
{
_invetoryContext.Orders.Add(order);
_invetoryContext.SaveChanges();
return order;
}
public Customer GetCustomer(int id)
{
throw new System.NotImplementedException();
}
public List<Customer> GetCustomers()
{
return _invetoryContext.Customers.ToList();
}
public List<Order> GetOrderByCustomer(int CustomerId)
{
return _invetoryContext.Orders
.Include(order => order.customer)
//.ThenInclude(customer => customer.Name)
.Where(order => order.CustomerId == CustomerId).ToList();
}
}
}
Customer table:
Order table:
Output I get when I pass customer id 2:
[
{
"orderId": 2,
"total": 200,
"customerId": 2,
"customer": {
"customerId": 2,
"name": "Ankit",
"email": "ankit#gmail.com"
}
},
{
"orderId": 4,
"total": 15000,
"customerId": 2,
"customer": {
"customerId": 2,
"name": "Ankit",
"email": "ankit#gmail.com"
}
}
]
This is the output I want:
{
"customer": {
"customerId": 2,
"name": "Ankit",
"email": "ankit#gmail.com",
"Order": [
{
"orderId": 2,
"total": 200,
"customerId": 2
},
{
"orderId": 4,
"total": 15000,
"customerId": 2
}
]
}
}