public void DeletePresidente(ModPresidente c)
        {
            p = new PerPresidente();
            List <ModPresidente> cs = p.Open();
            ModPresidente        r  = cs.Where(x => x.Id == c.Id).Single();

            cs.Remove(r);
            p.Save(cs);
        }
        public void InsertPresidente(ModPresidente x)
        {
            p = new PerPresidente();
            List <ModPresidente> cs = p.Open();
            int id = 1;

            if (cs.Count > 0)
            {
                id = cs.Max(c => c.Id) + 1;
            }
            x.Id = id;
            cs.Add(x);
            p.Save(cs);
        }
        public void UpdatePresidente(ModPresidente x)
        {
            p = new PerPresidente();
            List <ModPresidente> up = p.Open();

            for (int i = 0; i < up.Count; i++)
            {
                if (up[i].Id == x.Id)
                {
                    up.RemoveAt(i); break;
                }
            }

            up.Add(x);
            p.Save(up);
        }