I\'ve looked at the 101 Linq Samples here but I can\'t see anything like this in that list. If I\'m just not seeing a relevant example there, please link to it.
IEnumerable FindCoursesForStudent(Student student)
{
return from enrolment in Enrolments
where enrolment.studentId == student.id
join course in Courses
on enrolment.courseId equals course.id
select course;
}