private void Detachfeedbacks(feedback entity)
 {
     entity.student = null;
 }
 private bool Filterfeedbacks(feedback entity)
 {
     return (entity.studentID == this.studentID);
 }
 private bool Filterfeedbacks(feedback entity)
 {
     return (entity.moduleID == this.moduleID);
 }
 private void Attachfeedbacks(feedback entity)
 {
     entity.student = this;
 }
 private void Detachfeedbacks(feedback entity)
 {
     entity.module = null;
 }
 private void Attachfeedbacks(feedback entity)
 {
     entity.module = this;
 }
 private bool Filterfeedbacks(feedback entity)
 {
     return (entity.teacherID == this.teacherID);
 }
 private void Detachfeedbacks(feedback entity)
 {
     entity.Lecturer = null;
 }
 private void Attachfeedbacks(feedback entity)
 {
     entity.Lecturer = this;
 }