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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;
using System.Timers;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
System.Timers.Timer timer=new System.Timers.Timer();
int count = 0;
int beginbegin = 1;
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
beginbegin++;
if (beginbegin % 2==0)
{
timer.Elapsed += new ElapsedEventHandler(timer_Elapsed);
timer.Interval = 1000;
timer.Enabled = true;
}
else
{
timer.Enabled = false;
}
}
private void timer_Elapsed(object sender, ElapsedEventArgs e)
{
count++;
label1.Text = count.ToString();
}
}
}