delegate 多线程

using System;using System.Threading; public class Student{ private int score; public void SetScore(int value) { if (value > 100 || value < 0) { Console.Out.WriteLine("分数不对"); } else { score = value; if (AdviseDelegateInstance!= null) { AdviseDelegateInstance.BeginInvoke(score, new System.AsyncCallback(CallBackMethod), "idior"); } } } private void CallBackMethod(IAsyncResult asyncResult) { string result = AdviseDelegateInstance.EndInvoke(asyncResult); string stateObj=(string)asyncResult.AsyncState; Console.Out.WriteLine("学生{0}收到老师返回的结果/t" + result,stateObj); } public delegate string AdviseDelegate(int score); public AdviseDelegate AdviseDelegateInstance; } public class Teacher{ public string Advise(int score) { Thread.Sleep(3000); if (score < 60) { Console.Out.WriteLine(score + "老师说加油"); return "不及格"; } else { Console.Out.WriteLine(score + "老师说不错"); return "及格"; } }} class MainClass{ [STAThread] private static void Main(string[] args) { Teacher teacher = new Teacher(); Student s = new Student(); s.AdviseDelegateInstance= new Student.AdviseDelegate(teacher.Advise); Console.Out.WriteLine("学生得到50分"); s.SetScore(50); Console.Out.WriteLine("/n学生得到75分"); s.SetScore(75); Console.ReadLine(); }}