1-) C# - Timer Kullanımı

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace TimerKullanımı

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        int saat = 0, dakika = 0, saniye = 0;

        private void timer1_Tick(object sender, EventArgs e)

        {

            saniye++;

            label1.Text = saniye.ToString();

            if (saniye==60)

            {

                dakika++;

                label2.Text = dakika.ToString();

                saniye = 0;

                if (dakika==60)

                {

                    saat++;

                    label3.Text = saat.ToString();

                    dakika = 0;

                }

            }

        }

    }

}