private void Agregar(TicketVm ticketVm)
{
var obj = TicketFactory.CrearEntity(ticketVm);
obj.Numero = ObtenerProximoIdentificador();
obj.FechaCreacion = DateTime.Now;
TicketFactory.MapTicketEmpleado(ticketVm, obj);
TicketFactory.MapTicketEntrada(ticketVm, obj);
_repository.Agregar(obj);
}