public Student()
{
RegisterEventAppliers()
.For <IStudentRegisteredEvent>(Apply)
.For <IAddressChangedEvent>(Apply)
.For <IStudentEnrolledEvent>(e => Enrollments.Add(new Enrollment(this, e.EnrollmentId)))
.For <IEnrollmentEvent>(
e => Enrollments.Single(enrollment => enrollment.Id == e.EnrollmentId).ApplyEvent(e));
}