using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading;namespace ConsoleApplication1{    /// 
    /// 声明一个委托    /// 
    ///     /// 
         delegate double CalculateMethod(double Diameter);    class Program    {        /// 
        /// 定义委托对象        /// 
        public static CalculateMethod calcMethod;        /// 
        /// 计算结果        /// 
        public static double result = 0;        static void Main(string[] args)        {            /***********一、简单线程***********/            //ThreadStart threadStart = new ThreadStart(Calculate);            //Thread thread = new Thread(threadStart);            //thread.Start();            /***********二、线程传递单个参数******************/            //使用这个这个委托定义的线程的启动函数可以接受一个输入参数            //ParameterizedThreadStart threadStart = new ParameterizedThreadStart(Calculate);            //Thread thread = new Thread(threadStart);            //thread.Start(0.9);            /***********三、线程使用线程类调用方法******************/            //MyThread t = new MyThread(5.0);            //ThreadStart threadStart = new ThreadStart(t.Calculate);            //Thread thread = new Thread(threadStart);            //thread.Start();            /***********四、把参数传递变成了属性共享，把逻辑和逻辑涉及的数据封装在一起（匿名方法）******************/            //double Diameter = 0.9d;            //Thread thread = new Thread(new ThreadStart(delegate()            //{            //    Console.WriteLine("Calculate Start");            //    Thread.Sleep(2000);            //    Console.WriteLine("匿名方法: The perimeter Of Circle with a Diameter of {0} is {1}", Diameter, Diameter * Math.PI); ;            //    Console.Read();            //}));            //thread.Start();            /***********王、线程池******************/            WaitCallback w = new WaitCallback(Calculate);            ThreadPool.QueueUserWorkItem(w, 1.0);            ThreadPool.QueueUserWorkItem(w, 2.0);            ThreadPool.QueueUserWorkItem(w, 3.0);            ThreadPool.QueueUserWorkItem(w, 4.0);        }        /// 
        /// 简单线程调用方法        /// 
        ///         public static void Calculate()        {            double Diameter = 0.9d;            Console.WriteLine("Calculate Start");            Thread.Sleep(2000);//睡2秒            Console.Write("简单线程：The perimeter Of Circle with a Diameter of {0} is {1}", Diameter, Diameter * Math.PI);            Console.Read();        }        /// 
        /// 传递单个参数线程启用方法        /// 
        ///         public static void Calculate(object arg)        {            double Diameter = (double)arg;            Console.WriteLine("Calculate Start");            Thread.Sleep(2000);//睡2秒            Console.Write("线程传递单个参数：The perimeter Of Circle with a Diameter of {0} is {1}", Diameter, Diameter * Math.PI);            Console.Read();        }        /// 
        /// 线程池调用方法        /// 
        ///         /// 
             public static void Calculate(double Diameter)        {            Console.WriteLine("Calculate Start");            Thread.Sleep(2000);//睡2秒                        Console.Write("线程传递单个参数：The perimeter Of Circle with a Diameter of {0} is {1}", Diameter, Diameter * Math.PI);            Console.Read();        }    }    /// 
    /// 线程类(将线程要执行的方法和它需要的参数封装到类)    /// 
    public class MyThread    {        public double Diameter = 10;        public double Result = 0;        public MyThread(double Diameter)        {            this.Diameter = Diameter;        }        public void Calculate()        {            Console.WriteLine("Calculate Start");            Thread.Sleep(2000);//睡2秒            Console.WriteLine("Calculate End, Diameter is {0},Result is {1}", this.Diameter, Diameter * Math.PI);            Console.Read();        }    }}