异步线程使用的阻塞问题async await 举例

问题描述：我们在按钮事件下直接调用异步线程，会出现阻塞，程序卡死现象。如图点击直接运行按钮的效果
解决方法：在线程内运行异步线程，可以解决阻塞问题。

using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Data;
 using System.Drawing;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using System.Windows.Forms;namespace WindowsFormsApplication5
 {public partial class Form1 : Form{public Form1(){InitializeComponent();}private  int PointWork(int i){return i;}private  async Task OnePointWorAscnic(int i){int m = await Task.Run(() => PointWork(i));return m;}public  void Work(){List> TaskList = new List>();List points = new List { 1, 2, 3 };foreach (var i in points){Task m = OnePointWorAscnic(i);TaskList.Add(m);}foreach (var task in TaskList){int j = task.Result;             }MessageBox.Show("运行完成");}private void button1_Click(object sender, EventArgs e){Work();}private void button2_Click(object sender, EventArgs e){Task.Run(() => Work());}}
 }