[你必须知道的.NET] 第四回：后来居上：class和struct

Code
interface IPerson
{
    void GetSex();
}

Code
public class Person
{
    public Person()
    { 
    }

    public Person(string name, int age)
    {
        _name = name;
        _age = age;
    }

    private string _name;

    public string Name
    {
      get { return _name; }
      set { _name = value; }
    }

    private int _age;

    public int Age
    {
      get { return _age; }
      set { _age = value; }
    } 
}

Code
//可以继承自接口，不可继承类或结构
struct Family: IPerson
{
    public string name;
    public int age;
    public bool sex;
    public string country;
    public Person person;

    //不可以包含显式的无参构造函数和析构函数
    public Family(string name, int age, bool sex, string country, Person person)
    {
        this.name = name;
        this.age = age;
        this.sex = sex;
        this.country = country;
        this.person = person;
    }

    //不可以实现protected、virtual、sealed和override成员
    public void GetSex()
    {
        if (sex)
            Console.WriteLine(person.Name + " is a boy.");
        else
            Console.WriteLine(person.Name + " is a girl.");
    }

    public void ShowPerson()
    {
        Console.WriteLine("This is {0} from {1}", new Person(name, 22).Name, country);
    }

    //可以重载ToString虚方法
    public override string ToString()
    {
        return String.Format("{0} is {1}, {2} from {3}", person.Name, age, sex ? "Boy" : "Girl", country);
    }
}