public CommandResult Criar(CriarMesReferenciaCommand command)
        {
            try
            {
                command.Validate();
                if (command.Invalid)
                {
                    return(CommandResult.Invalid(command.Notifications.ToNotificationsString()));
                }

                MesReferencia mesRef = MesReferencia.Criar(
                    DataString.FromString(command.MesAno),
                    command.DataInicio,
                    command.DataTermino,
                    command.Ativo);

                dataContext.Add(mesRef);
                dataContext.SaveChanges();

                return(CommandResult.Valid());
            }
            catch (Exception ex)
            {
                return(CommandResult.Invalid(ex.Message));
            }
        }