internal static void EventTest()
{
Console.WriteLine("事件示例\n");
NewsPublisher publisher = new NewsPublisher("新闻发布者");
NewsReader reader1 = new NewsReader("读者1", publisher);
NewsReader reader2 = new NewsReader("读者2", publisher);
NewsReader reader3 = new NewsReader("读者3", publisher);
Console.WriteLine($"{publisher.Name}发布了一则新闻。");
publisher.PublishNews("早间新闻");
Console.WriteLine($"{publisher.Name}发布了一则新闻。");
publisher.PublishNews("晚间新闻");
}
//在构造函数中订阅一个事件
public NewsReader(string name, NewsPublisher publisher)
{
Name = name;
publisher.NewsEvent += HandleNewsEvent;
}