程序代码：

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

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            xianshi();
        }
       public static int miao = 60;

       public void xianshi()
       {
           textBox1.Text = miao.ToString();
       }

       private void timer1_Tick(object sender, EventArgs e)
       {
           miao -= 1;
           xianshi();
       }

       private void button1_Click(object sender, EventArgs e)
       {
           timer1.Enabled = true;
       }
       
    }
}