Linq query for joining many to many tables - sql

Question

I'm new at LINQ and need your advice.
I have 2 tables like these:
public class Subjects
{
public Subjects()
{
Classes = new List<Classes>();
}
public int Id { get; set; }
public string SubjectName { get; set; }
public virtual List<Classes> Classes { get; set; }
}
public class Classes
{
public Classes()
{
Subjects = new List<Subjects>();
}
public int Id { get; set; }
public string ClassName { get; set; }
public virtual List<Subjects> Subjects { get; set; }
}
And Entity Framework create SubjectClasses
public SubjectsMap()
{
this.HasKey(s => s.Id);
this.Property(s => s.SubjectName)
.IsRequired()
.HasMaxLength(50);
this.ToTable("Subjects");
this.HasMany(c => c.Classes)
.WithMany(s => s.Subjects)
.Map(cs =>
{
cs.MapLeftKey("SubjectId");
cs.MapRightKey("ClassId");
cs.ToTable("SubjectClasses");
});
}
Subject---- SubjectClasses ----- Classes
My Context doesn't have SubjectClasses, so I need to convert the SQL query to Linq or Lambda. But Linqpad doesn't help me or I can't use it. I simply want to take Firstname, SubjectName
SELECT st.Firstname, s.SubjectName
FROM SubjectClasses sc
INNER JOIN Subjects s on s.Id = sc.SubjectId
INNER JOIN Students st on st.ClassId = sc.ClassId
WHERE sc.ClassId = 3

Answer 1

It's working.
(from st in context.Students
from s in context.Subjects
join c in context.Classes
on new { stuId = st.ClassId } equals new { stuId = c.Id }
select new ComplexExamResult
{
Id = c.Id,
Firstname = st.Firstname,
SubjectName = s.SubjectName
}).Where(c => c.Id == classId).AsNoTracking().ToList();