public EfUserRepository(string conn)
        {
            context = new EfUserDataContext(conn);
        }

public IQueryable<User> All()
        {
            return context.SocialUsers;
        }

        public User GetById(int id)
        {
            return this.All().FirstOrDefault(p => p.Id == id);
        }

public void Update(User entity)
        {
            if (entity == null)
                throw new ArgumentNullException("entity");
            var user = this.GetById(entity.Id);            
            user.Nickname = entity.Nickname;
            user.FirstName = entity.FirstName;
            user.LastName = entity.LastName;            
            user.BirthDate = entity.BirthDate;
            user.Email = entity.Email;
            user.Country = entity.Country;
            user.State = entity.State;
            user.City = entity.City;
            user.Zip = entity.Zip;
            user.CellPhone = entity.CellPhone;
            user.LastVisit = entity.LastVisit;            

        }

context.SaveChanges();