public bool AgregarPer(string rut, string username, int edad, char sex, bool ex_pre, String nomPc)
        {
            try
            {
                Cl_Persona per = new Cl_Persona();
                per.Rut = rut;
                per.UserName = username;
                per.Edad = edad;
                per.Sexo = sex;
                per.Exp_prev = ex_pre;
                per.Computador = new Cl_Computador(nomPc);
                return per.Agregar();

            }
            catch (Exception)
            {

                return false;
            }
        }
        public bool EliminarPer(string rut)
        {
            try
            {
                Cl_Persona per = new Cl_Persona();
                per.Rut = rut;
                return per.Eliminar();
            }
            catch (Exception)
            {

                return false;
            }
        }
 public bool BuscarPer(string rut)
 {
     Cl_Persona per = new Cl_Persona();
     per.Rut = rut;
     return per.Buscar();
 }
 public List<Cl_Persona> ListadoNovatos()
 {
     try
     {
         List<Persona> pers = cone.Entidades.Persona.Where(x => x.exp_prev == false).ToList();
         List<Cl_Persona> lista = new List<Cl_Persona>();
         foreach (Persona item in pers)
         {
             Cl_Persona per = new Cl_Persona();
             per.Edad = item.edad;
             per.Exp_prev = item.exp_prev;
             per.Rut = item.rut;
             per.Sexo = char.Parse(item.sexo.Trim());
             per.UserName = item.username;
             lista.Add(per);
         }
         return lista;
     }
     catch (Exception)
     {
         return null;
     }
 }