hey guys
i have 2 timers class in my code
one timer tick every 1 min and the other timer tick every second to show elapsed time in timer 1
here is the code

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 TimerTest
{
    public partial class Form1 : Form
    {
        Timer t1 = new Timer(); // timer 1
        Timer t2 = new Timer(); // timer 2
        int timeInteger;

        public Form1()
        {
            InitializeComponent();
        }


        private void Start_Click(object sender, EventArgs e)
        {
            t1.Interval = 60000; // set timer one 1 minute
            t2.Interval = 1000; // set timer two 1 second
            timeInteger = t1.Interval; // set timer 1 in integer


            //Hook event handler
            t1.Tick += new EventHandler(t1_Tick);
            t2.Tick += new EventHandler(t2_tick);
            //start the timer
            t1.Start();
            t2.Start();
        }

        private void Stop_Click(object sender, EventArgs e)
        {
            timeInteger = 0;
            label1.Text = "";
            t1.Dispose();
            t2.Dispose();
        }

        void t2_tick(object sender, EventArgs e)
        {
            timeInteger -= 1000; // how many time left minus 1000 millisecond
            label1.Text = timeInteger.ToString(); // display the time
        }
        void t1_Tick(object sender, EventArgs e)
        {
            //timer counts 60000 milliseconds. :)
        }
    }
}

the code works fine when i click start
but when i click stop then start again the time displayed go completely wrong

whats the problem

You dispose of the objects in your stop method and never create new ones.

As Momerath said, and I would add only that you do not create a new insatance of a Timer class ones again when pressing a start button!
Try to change the code into:

public partial class Form1 : Form
    {
        Timer t1; // timer 1
        Timer t2; // timer 2
        int timeInteger;

        public Form1()
        {
            InitializeComponent();
        }


        private void Start_Click(object sender, EventArgs e)
        {
            t1 = new Timer();
            t2 = new Timer();
            t1.Interval = 60000; // set timer one 1 minute
            t2.Interval = 1000; // set timer two 1 second
            timeInteger = t1.Interval; // set timer 1 in integer


            //Hook event handler
            t1.Tick += new EventHandler(t1_Tick);
            t2.Tick += new EventHandler(t2_tick);
            //start the timer
            t1.Start();
            t2.Start();
        }
  
        //AND THE ADDITIONAL CODE BELLOW HERE...
    }