委托的高级使用

 class Program
    {
        static void Main(string[] args)
        {
            Student stu1 = new Student() { ID=1,PenColor=ConsoleColor.Yellow};
            Student stu2 = new Student { ID = 2, PenColor = ConsoleColor.Green };
            Student stu3 = new Student { ID = 3, PenColor = ConsoleColor.Red };

            //stu1.DoHomeWork();//直接调用，同步
            //stu2.DoHomeWork();
            //stu3.DoHomeWork();

            Action action1 = new Action(stu1.DoHomeWork);//间接调用，同步
            Action action2 = new Action(stu2.DoHomeWork);
            Action action3 = new Action(stu3.DoHomeWork);
            //action1 += action2;
            //action1 += action3;
            //action1();//多播委托，根据封装方法的顺序//间接调用，同步


            //action1();//单播委托//间接调用，同步
            //action2();//单播委托
            //action3();//单播委托


            //委托的异步调用
            //action1.BeginInvoke(null,null);//隐式间接的异步调用，会生成一个分支方法，两个参数第一个参数是回调方法，只子线程执行完，需要执行什么东西
            //action2.BeginInvoke(null, null);//
            //action3.BeginInvoke(null, null);



         //一般的多线程
            Thread thread1 = new Thread(new ThreadStart(stu1.DoHomeWork));//显式的直接的异步调用，
            Thread thread2 = new Thread(new ThreadStart(stu2.DoHomeWork));
            Thread thread3 = new Thread(new ThreadStart(stu3.DoHomeWork));

            thread1.Start();
            thread2.Start();
            thread3.Start();

            //高级一点带委托的多线程
            Task task1 = new Task(new Action(stu1.DoHomeWork));//显式的异步调用
            Task task2 = new Task(new Action(stu2.DoHomeWork));
            Task task3 = new Task(new Action(stu3.DoHomeWork));

            task1.Start();
            task2.Start();
            task3.Start();


            for (int i = 0; i < 10;i++ )
            {
                Console.ForegroundColor = ConsoleColor.Cyan;
                Console.WriteLine("Main thread{0}",i);
                Thread.Sleep(1000);
            }
                Console.ReadLine();
        }
    }
    class Student
    {
        public int ID { get; set; }
        public ConsoleColor PenColor { get; set; }
        public void DoHomeWork()
        { 
        for(int i=0;i<5;i++)
        {
            Console.ForegroundColor = this.PenColor;
            Console.WriteLine("Student{0} doing homework {1} hours",this.ID,i);
            Thread.Sleep(1000);
            
        }
        }
    }