线程池提供了一个后台线程的池，独自管理线程，按需增加或减少线程池中的线程数。线程池中的线程用于执行一些动作后仍然返回线程池中。
using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading;using System.Threading.Tasks;using System.IO;namespace TaskSamples{ ?class Program ?{ ???static void Main() ???{ ?????TasksUsingThreadPool(); ?????Console.ReadLine(); ???} ???????static void TasksUsingThreadPool() ???{ ?????var tf = new TaskFactory(); ?????Task t1 = tf.StartNew(TaskMethod, "using a task factory"); ?????Task t2 = Task.Factory.StartNew(TaskMethod, "factory via a task"); ?????var t3 = new Task(TaskMethod, "using a task constructor and Start"); ?????t3.Start(); ?????Task t4 = Task.Run(() => TaskMethod("using the Run method")); ???} ???static object taskMethodLock = new object(); ???static void TaskMethod(object title) ???{ ?????lock (taskMethodLock) ?????{ ???????Console.WriteLine(title); ???????Console.WriteLine("Task id: {0}, thread: {1}", ?????????Task.CurrentId == null ? "no task" : Task.CurrentId.ToString(), ?????????Thread.CurrentThread.ManagedThreadId); ???????Console.WriteLine("is pooled thread: {0}", Thread.CurrentThread.IsThreadPoolThread); ???????Console.WriteLine("is background thread: {0}", Thread.CurrentThread.IsBackground); ???????Console.WriteLine(); ?????} ???} ?}}
实例化TaskFactory类，将要执行的方法作为参数传递给实例的StartNew方法
var tf = new TaskFactory();Task t1 = tf.StartNew(TaskMethod, "using a task factory");
使用Task类的静态属性TaskFactory访问TaskFactory,并调用其StartNew方法
Task t2 = Task.Factory.StartNew(TaskMethod, "factory via a task");
使用Task类的构造函数实例化Task对象，并调用其Start方法
var t3 = new Task(TaskMethod, "using a task constructor and Start");t3.Start();
调用Task类的静态方法Run,参数为一个Action委托
Task t4 = Task.Run(() => TaskMethod("using the Run method"));dotnet Core 异步任务
原文地址：https://www.cnblogs.com/zhurunlai/p/9528699.html