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.IO;
namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {        // variable d'instance
  
        private DateTime début = DateTime.Now;
                      
       
        public Form1()
        {
            InitializeComponent();
            this.dateTimePicker1.Format = DateTimePickerFormat.Time;
            this.dateTimePicker1.Width = 100;
            this.dateTimePicker1.ShowUpDown = true;
            
        }

 private void button_start_Click(object sender, EventArgs e)
        {
             
     // arrêt ou marche ?
 if (button_start.Text == "Marche") {
 // on change le libellé du bouton
 button_start.Text = "Arrêt";
// fin
 return;
}
if (button_start.Text == "Arrêt") {
 // on change le libellé du bouton
 button_start.Text = "Marche";
 // fin
 return;
 }
 }



 private void timer1_Tick_1(object sender, EventArgs e)
 {
     this.dateTimePicker1.Value = DateTime.Now;
     DateTimePicker timer1_Tick_1 = new DateTimePicker();
     // Set the MinDate and MaxDate.
     timer1_Tick_1.MinDate = new DateTime(1985, 6, 20);
     timer1_Tick_1.MaxDate = DateTime.Today;


 }

 private void checkBox1_CheckedChanged(object sender, EventArgs e)
 {

 }

 private void dateTimePicker2_ValueChanged(object sender, EventArgs e)
 {

 }
}
       }