private void detach_Notas(Nota entity)
 {
     this.SendPropertyChanging("Notas");
     entity.Evaluacion = null;
 }
 partial void DeleteNota(Nota instance);
 partial void UpdateNota(Nota instance);
 partial void InsertNota(Nota instance);
 private void detach_Notas(Nota entity)
 {
     this.SendPropertyChanging("Notas");
     entity.Alumno = null;
 }
 private void attach_Notas(Nota entity)
 {
     this.SendPropertyChanging("Notas");
     entity.Alumno = this;
 }