c# Thread.Sleep与Task.Delay 区别

1、Thread.Sleep 是同步延迟， Task.Delay异步延迟。

2、Thread.Sleep 会阻塞线程，Task.Delay不会。

            Task.Factory.StartNew(delegate
            {
                for(int i=1;i<50;i++)
                {
                    System.Diagnostics.Debug.WriteLine(i.ToString());
                    Thread.Sleep(100);
                }
            });


            Task.Factory.StartNew(delegate
            {
                for (int i = 101; i < 150; i++)
                {
                    System.Diagnostics.Debug.WriteLine(i.ToString());
                    Task.Delay(100);
                }
            });

虽然此处delay的用法有待商榷，但确实不会阻塞

3、Thread.Sleep不能取消，Task.Delay可以。

引用别人的例子

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;


namespace ThreadSleepTaskDelayDemo
{
    public partial class Form1 : Form
    {
        CancellationTokenSource tokenSource = new CancellationTokenSource();


        public Form1()
        {
            InitializeComponent();
        }


        private void btnThreadSleep_Click(object sender, EventArgs e)
        {
            PutThreadSleep();
            MessageBox.Show("I am back");
        }


        private async void btnTaskDelay_Click(object sender, EventArgs e)
        {
            await PutTaskDelay();
            MessageBox.Show("I am back");
        }


        void PutThreadSleep()
        {
            Thread.Sleep(5000);
        }


        async Task PutTaskDelay()
        { 
            try
            {
                await Task.Delay(5000, tokenSource.Token);
            }
            catch (TaskCanceledException ex)
            {
                
            }
            catch (Exception ex)
            { 
            
            }
        }


        private void btnCancelTaskDelay_Click(object sender, EventArgs e)
        {
            tokenSource.Cancel();
        }
    }
}