c# – 在对象中有一个对象列表是否正常？

// Person object containing a list of phone numbers
public class Person
{
    public Guid Id { get; set; }
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public List<Phone> Contacts { get; set; }

    public void AddPhoneNumber(Phone phone)
    {
        Contacts.Add(phoneNumber);
    }
}

// Phone object
public class Phone
{
    public Guid Id { get; set; }
    public string Name { get; set; }
    public string Number { get; set; }
}

// Example code to establish an object:
Person p1 = new Person();
p1.FirstName = "John";
p1.LastName = "Smith";
p1.AddPhoneNumber(new Phone() { Number = "555957000" });
p1.AddPhoneNumber(new Phone() { Number = "555579561" });

是否有更好的结构方法可以简化设计并更容易访问数据？谢谢！