Entity Framework fires query to load related object although explicit loading for those objects is already done - entity-framework

Question

I have these models and context in my application :
public class Department
{
public int Id { get; set; }
public string Name { get; set;}
public virtual ICollection<Student> Students { get; set; }
}
public class Student
{
public int Id { get; set; }
public string Name { get; set; }
public virtual Department Department { get; set; }
}
public class TestContext : DbContext
{
public DbSet<Student> Students { get; set; }
public DbSet<Department> Departments { get; set; }
}
Below is my code in Program.cs class :
class Program
{
static void Main(string[] args)
{
using (var context = new TestContext())
{
var students = context.Students.SqlQuery("Select * from dbo.Students").ToList();
context.Departments.Load();
Console.WriteLine(students[0].Department.Name);
Console.ReadLine();
}
}
}
Although related object - Department is loaded in the context by the line - context.Departments.Load(), still when the department name is printed in console entity framework fires a query in the database to fetch the related object. Shouldnt this query for related object fetching not be fired since the objects are already loaded in the context. ?
If i change the code to below -
var students = context.Students.ToList();
context.Departments.Load();
Console.WriteLine(students[0].Department.Name);
Then when u access student[0].Department.Name , Ef doestnot fire a sql query to load department property.

Answer 1

Apparently Change Tracker relationship fix-up doesn't work with the combination of Independent Associations and raw SQL queries.
To fix just add Foreign Key property to Student. eg
public class Student
{
public int Id { get; set; }
public string Name { get; set; }
public int DepartmentId { get; set; }
public virtual Department Department { get; set; }
}