[C++] 记《learning hard C#学习笔记》 书中一个错误

class Person
  {
    private string name;
    private static Person person;
    public string Name
    {
      get { return name; }
    }
    private Person()
    {
      Console.WriteLine("私有构造方法被调用");
      this.name = "learning hard";
    }
    public static Person getInstance()
    {
      if (person == null)
      {
        person = new Person();
      }
      return person;
    }
  }

class Program
  {
    static void Main(string[] args)
    {
      Person person1 = Person.getInstance();
      Person person2 = Person.getInstance();
      Console.WriteLine("单例是否有效:{0}", person1 == person2);
      Console.WriteLine("类实例的name属性为:{0}",person1.Name);
      Console.Read();
    }
  }