比较两个类(Users和Holidays)并使用LINQ创建未创建Holiday类实例的用户列表的最佳方法

public class User
{
    public int Id { get; set; }
    public string Name { get; set; }
}

public class Holiday
{
    public int UserId { get; set; }
    public string Description { get; set; }
}

List<User> users = new List<User>
{
    new User { Id = 1, Name = "User 1" },
    new User { Id = 2, Name = "User 2" },
    new User { Id = 3, Name = "User 3" }
};

List<Holiday> holidays = new List<Holiday>
{
    new Holiday { UserId = 1, Description = "Holiday 1" },
    new Holiday { UserId = 3, Description = "Holiday 2" }
};

var usersWithoutHoliday = from user in users
                          join holiday in holidays
                          on user.Id equals holiday.UserId into gj
                          from subHoliday in gj.DefaultIfEmpty()
                          where subHoliday == null
                          select user;

foreach (var user in usersWithoutHoliday)
{
    Console.WriteLine(user.Name);
}