namespace Test
{class Program{static void Main(string[] args){Thread t1 = new Thread(new ThreadStart(TestMethod));Thread t2 = new Thread(new ParameterizedThreadStart(TestMethod));t1.IsBackground = true;t2.IsBackground = true;t1.Start();t2.Start("hello");Console.ReadKey();}public static void TestMethod(){Console.WriteLine("不带参数的线程函数");}public static void TestMethod(object data){string datastr = data as string;Console.WriteLine("带参数的线程函数，参数为：{0}", datastr);}}
}

namespace Test
{class Program{static void Main(string[] args){//将工作项加入到线程池队列中，这里可以传递一个线程参数ThreadPool.QueueUserWorkItem(TestMethod, "Hello");Console.ReadKey();}public static void TestMethod(object data){string datastr = data as string;Console.WriteLine(datastr);}}
}

namespace Test
{class Program{static void Main(string[] args){Task<Int32> t = new Task<Int32>(n => Sum((Int32)n), 1000);t.Start();t.Wait();Console.WriteLine(t.Result);Console.ReadKey();}private static Int32 Sum(Int32 n){Int32 sum = 0;for (; n > 0; --n)checked{ sum += n;} //结果太大，抛出异常return sum;}}
}

namespace Test
{class Program{static void Main(string[] args){Task<Int32> t = new Task<Int32>(n => Sum((Int32)n), 1000);t.Start();//t.Wait();Task cwt = t.ContinueWith(task => Console.WriteLine("The result is {0}",t.Result));Console.ReadKey();}private static Int32 Sum(Int32 n){Int32 sum = 0;for (; n > 0; --n)checked{ sum += n;} //结果溢出，抛出异常return sum;}}
}

namespace Test
{public delegate string MyDelegate(object data);class Program{static void Main(string[] args){MyDelegate mydelegate = new MyDelegate(TestMethod);IAsyncResult result = mydelegate.BeginInvoke("Thread Param", TestCallback, "Callback Param");//异步执行完成string resultstr = mydelegate.EndInvoke(result);}//线程函数public static string TestMethod(object data){string datastr = data as string;return datastr;}//异步回调函数public static void TestCallback(IAsyncResult data){Console.WriteLine(data.AsyncState);}}
}