static void Main(string[] args)
{
HelloService helloService = new HelloService();
ConsumerService consumerService = new ConsumerService(helloService);
consumerService.Print();
Console.ReadKey();
}
static void Main(string[] args)
{
HelloService helloService = (HelloService)Activator.CreateInstance(typeof(HelloService)); //动态创建对象HelloService
ConsumerService consumerService = (ConsumerService)Activator.CreateInstance(typeof(ConsumerService), helloService); //动态创建对象ConsumerService
consumerService.Print();
Console.ReadKey();
}