c#多线程中（前台线程与后台线程的区别）

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;
using System.Threading;

namespace IsbackGround
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void DoWork()
        {
            for (int i = 0; i < 5; i++)
            {
                MessageBox.Show("我擦");
                Thread.Sleep(2000);
            }
        }
        private void qiantai()
        {
            ThreadStart ts = new ThreadStart(DoWork);
            Thread thread = new Thread(ts);
            thread.IsBackground = false; //是前台线程
            thread.Start();
        }
        private void houtai()
        {
            ThreadStart ts = new ThreadStart(DoWork);
            Thread thread = new Thread(ts);
            thread.IsBackground = true; //后台线程
            thread.Start();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            qiantai();
            //总结:
            //默认情况下，新建的线程为前台线程； 可以通过isbackground来查看；
            //当所有的前台线程执行完毕之后，应用程序结束，不管后台进程是否执行完毕；
            //并释放掉全部资源；


        }
    }
}