Form2.cs

微信扫码关注公众号，代码整理好后第一时间通知你。

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

namespace CSharp实现消息框倒计时自动关闭窗口
{
    public partial class Form2 : Form
    {
        private int waitSecond = 10;
        public Form2()
        {
            InitializeComponent();
        }
        // 下载于www.51aspx.com
        private void button1_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            if (waitSecond < 1)
            {
                this.Close();
            }
            else
            {
                waitSecond--;
                label1.Text = "窗口将在" + waitSecond + "秒后关闭";
            }
        }
    }
}