LINQ Query to get Student Classes - linq

Question

I have a table student and a table classes and a third table studentclasses having studentid and classic as foreign keys. I want to write a query that allows me to display the following:
{
"code": "10001",
"Name": "Lola",
"classes": [
{
"id": 1,
"name": "class1"
},
{
"id": 2,
"name": "class2"
},
{
"id": 3,
"name": "class3"
}
]
},

Answer 1

using System;
using System.Collections.Generic;
using System.Linq;
namespace ConsoleApp3
{
class Student
{
public int Id { get; set; }
public string Name { get; set; }
public List<StudentClasses> StudentClasses { get; set; }
}
class Classes
{
public int Id { get; set; }
public string Name { get; set; }
public List<StudentClasses> StudentClasses { get; set; }
}
class StudentClasses
{
public int ClassesId { get; set; }
public int StudentId { get; set; }
public Classes Classes { get; set; }
public Student Student { get; set; }
}
class Program
{
static void Main(string[] args)
{
var mathClass = new Classes()
{
Id = 1,
Name = "Math"
};
var englishClass = new Classes()
{
Id = 1,
Name = "English"
};
var nermine = new Student()
{
Id = 1,
Name = "Nermine"
};
var nermineMath = new StudentClasses()
{
Classes = mathClass,
Student = nermine
};
var nermineEnglish = new StudentClasses()
{
Classes = englishClass,
Student = nermine
};
var data = new List<StudentClasses>() { nermineEnglish, nermineMath };
var result = data.Select(x =>
new
{
Code = x.Student.Id,
Name = x.Student.Name,
Classes = new { Id = x.Classes.Id, Name = x.Classes.Name }
}).ToList();
result.ForEach(x => Console.WriteLine(x));
//returns
//{ Code = 1, Name = Nermine, Classes = { Id = 1, Name = English } }
//{ Code = 1, Name = Nermine, Classes = { Id = 1, Name = Math } }
}
}
}

Answer 2

[System.Web.Http.Route("api/data/StudentClasses")]
public IEnumerable<Student> GetStudentClasses() {
var db = new School_DBEntities();
var xx = db.Students.ToList().Select(q=>new Student()
{
Student_ID=q.Student_ID,
First_Name=q.First_Name,
Classes=q.StudentsClasses.ToList().Select(e=>new Class()
{
Class_code=e.Class,
Class_Name=db.Classes.FirstOrDefault(v=>v.Class_code==e.Class).Class_Name
}).ToList()
});
return xx;
}