C# Thread IsBackground 前后台线程

Thread 区别前后台线程属性IsBackground

1、  创建一个线程默认是前台线程，即IsBackground=true

2、  主线程的结束会关联前台线程，前台线程会阻止主进程的结束，需等待前台线程完成。

3、  主进程结束时后台线程也会结束，即使没有执行完成也会被中断。

        static void Main(string[] args)
        {
            BackgroundTest shortTest = new BackgroundTest(50);
            Thread foregroundThread =
                new Thread(new ThreadStart(shortTest.RunLoop));
            foregroundThread.Name = "ForegroundThread";

            BackgroundTest longTest = new BackgroundTest(100);
            Thread backgroundThread =
                new Thread(new ThreadStart(longTest.RunLoop));
            backgroundThread.Name = "BackgroundThread";
            backgroundThread.IsBackground = true;

            foregroundThread.Start();
            backgroundThread.Start();

           Task.Factory.StartNew(() =>
            {
                Thread.CurrentThread.Name = "Task Thread";
                Thread.CurrentThread.IsBackground = false; //设置为前台线程
                new BackgroundTest(50).RunLoop();
            });

//回车结束主线程，如果有前台线程在运行是无法结束的，（后台线程就会被终止，不会执行完成）
            Console.ReadLine();
        }

        class BackgroundTest
        {
            int maxIterations;

            public BackgroundTest(int maxIterations)
            {
                this.maxIterations = maxIterations;
            }

            public void RunLoop()
            {
                String threadName = Thread.CurrentThread.Name;

                for (int i = 0; i < maxIterations; i++)
                {
                    Console.WriteLine("{0} count: {1}",
                        threadName, i.ToString());
                    Thread.Sleep(250);
                }
                Console.WriteLine("{0} finished counting.", threadName);
            }
        }