Instance of Start method for Task Usage

First, basic use

The difference between the Thread,threadpool,task task is. NET4.0 joins, similar to the function of the thread pool ThreadPool, when a new task is opened with a task, the thread is called from the thread pool, and thread creates a new thread each time the instantiation occurs. If this is a long operation, use the taskcreationoptions.longrunning in the task Acton,taskcreationoptions constructor to imply that the Task Scheduler is putting this thread on a non-threaded pool to execute

The second to fourth method of starting

1) Start with start, new a 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 < i++)            {                Console.WriteLine ("i={0}\n", I);}        }    }

　　

2) run directly by running, accept parameters an action, return object is a task

static void Main (string[] args)        {            task.run () =            {for                (int i = 0; i <; i++)                {                    CONSOLE.WR Iteline ("i={0}", i);                }            );            Console.readkey ();        }

3) thread with return parameters

   task<int> task = task.run<int> (() = =            {                int sum = 0;                for (int i = 0; i < i++)                {                    sum + = 1;                }                return sum;            });            int result = task. Result;            Console.WriteLine ("Result of operation: {0}", result);//output of            console.readkey ();

4) through Task.factory

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