## 使用任务执行基本的操作 ```csharp /// <summary> /// 使用任务执行基本的操作 /// </summary> /// <param name="args"></param> static void Main(string[] args) { // 直接调用，同步执行，不是线程池中的线程 TaskMethod("Main Thread Task"); Task<int> task = CreateTask("Task 1"); // 启动任务 // 该任务会被放置在线程池中 task.Start(); // 等待结果（直到任务返回前，主线程一直处于阻塞状态） int result = task.Result; Console.WriteLine($"Result is: {result}"); task = CreateTask("Task 2"); // 同步运行该任务 // 该任务会运行在主线程中，运行结果同直接调用一样 task.RunSynchronously(); result = task.Result; Console.WriteLine($"Result is: {result}"); task = CreateTask("Task 3"); Console.WriteLine(task.Status); // Created // 启动任务 task.Start(); // 这里没有阻塞主线程，而是在任务完成前循环打印任务状态 // 任务状态分别为：Created、Running和RanToCompletion while (!task.IsCompleted) { Console.WriteLine(task.Status); // Running和RanToCompletion Thread.Sleep(TimeSpan.FromSeconds(0.5)); } Console.WriteLine(task.Status); // RanToCompletion result = task.Result; Console.WriteLine($"Result is: {result}"); Console.ReadLine(); } static Task<int> CreateTask(string name) { return new Task<int>(() => TaskMethod(name)); } static int TaskMethod(string name) { Console.WriteLine($"Task {name} is running on a thread id {Thread.CurrentThread.ManagedThreadId}. Is thread pool thread: {Thread.CurrentThread.IsThreadPoolThread}"); Thread.Sleep(TimeSpan.FromSeconds(2)); return 42; } ``` 打印结果 ``` Task Main Thread Task is running on a thread id 1. Is thread pool thread: False Task Task 1 is running on a thread id 3. Is thread pool thread: True Result is: 42 Task Task 2 is running on a thread id 1. Is thread pool thread: False Result is: 42 Created Task Task 3 is running on a thread id 4. Is thread pool thread: True Running Running Running Running Running RanToCompletion Result is: 42 ``` Loading... 版权声明：本文为博主「佳佳」的原创文章，遵循 CC 4.0 BY-NC-SA 版权协议，转载请附上原文出处链接及本声明。 原文链接：https://www.liujiajia.me/2017/7/19/csharp-multi-threading-04-tpl-02-basictask-operation 提交
