public virtual long ItemsCount(ManageEvaluationsAction action)
 {
     return((Evaluators == null || (Evaluators.Any() && Evaluators.Count == 0)) ? 0 : Evaluators.Select(e => e.ItemsCount(action)).Sum());
 }
 public virtual List <long> GetIdEvaluations()
 {
     return((Evaluators == null || (Evaluators.Any() && Evaluators.Count == 0)) ? new List <long>() : Evaluators.Select(e => e.IdEvaluation).ToList());
 }