public void RemoveDiscipline(Disciplines discipline)
 {
     this.Disciplines.Remove(discipline);
 }
 public void RemoveDiscipline(Disciplines discipline)
 {
     this.Disciplines.Remove(discipline);
 }
 public void AddDiscipline(Disciplines discipline)
 {
     this.Disciplines.Add(discipline);
 }
 public void AddDiscipline(Disciplines discipline)
 {
     this.Disciplines.Add(discipline);
 }