Task usage (1)-start method, task usage

Task usage (1)-start method, task usage
First, basically use Thread, ThreadPool, the difference between tasks is. added by NET4.0 is similar to the ThreadPool function of the Thread pool. When a Task is used to start a new Task, the Thread is called from the Thread pool, and a new Thread is created every time the Thread is instantiated. For a long operation, use Task (Acton, TaskCreationOptions) to construct TaskCreationOptions in the function. longRunning, indicating that the task scheduler places this thread on a non-thread pool to execute the second and fourth startup methods.1) start through start, a new Task, where the parameter is an Action 

 class Program    {        static void Main(string[] args)        {            Task t = new Task(DoA);            t.Start();            Console.ReadKey();        }        static void DoA()        {            for (int i = 0; i < 100; i++)            {                Console.WriteLine("i={0}\n", i);            }        }    }

　　

2) Run directly through Run, and accept an Action as the parameter. The returned object is a Task.

 static void Main(string[] args)        {            Task.Run(() =>            {                for (int i = 0; i < 50; i++)                {                    Console.WriteLine("i={0}",i);                }            });            Console.ReadKey();        }

 

3) threads with return parameters

Task <int> task = Task. run <int> () => {int sum = 0; for (int I = 0; I <50; I ++) {sum + = 1 ;} return sum;}); int result = task. result; Console. writeLine ("Calculation result: {0}", result); // output 50 Console. readKey ();

 

4) use Task. Factory

  Task t = Task.Factory.StartNew(() =>              {                  for (int i = 0; i < 10; i++)                  {                      Console.WriteLine("i={0}", i);                  }              });