存储库模式和IQueryable 的性能

Get

    public IQueryable<User> GetUsers(IEnumerable<Expression<Func<User, object>>> eagerLoading)
    {
        IQueryable<User> query = db.Users.AsNoTracking();

        if (eagerLoading != null)
        {
            foreach (var expression in eagerLoading)
            {
                query = query.Include(expression);
            }
        }            
        return query;
    }

GetCountries

GeographyRepository

myViewModel.User = userService.GetUserById(1);
myViewModel.Countries = geoService.GetCountries();