Csharp/C Sharp by API/System.Timers/Timer

new Timer()

  
using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
public class Form1 : System.Windows.Forms.Form {
    public System.Timers.Timer timer1;
    private System.Windows.Forms.Label label1;
    public Form1() {
        this.timer1 = new System.Timers.Timer();
        this.label1 = new System.Windows.Forms.Label();
        ((System.ruponentModel.ISupportInitialize)(this.timer1)).BeginInit();
        this.SuspendLayout();
        // 
        // timer1
        // 
        this.timer1.Enabled = true;
        this.timer1.SynchronizingObject = this;
        this.timer1.Elapsed += new System.Timers.ElapsedEventHandler(this.OnTimerElapsed);
        // 
        // label1
        // 
        this.label1.Font = new System.Drawing.Font("Microsoft Sans Serif", 14.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
        this.label1.ForeColor = System.Drawing.SystemColors.Highlight;
        this.label1.Location = new System.Drawing.Point(24, 8);
        this.label1.Name = "label1";
        this.label1.Size = new System.Drawing.Size(224, 48);
        this.label1.TabIndex = 0;
        this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
        // 
        // Form1
        // 
        this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
        this.ClientSize = new System.Drawing.Size(292, 69);
        this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                      this.label1});
        this.Text = "My Clock";
        this.Load += new System.EventHandler(this.Form1_Load);
        ((System.ruponentModel.ISupportInitialize)(this.timer1)).EndInit();
        this.ResumeLayout(false);
    }
    [STAThread]
    static void Main() {
        Application.Run(new Form1());
    }
    private void Form1_Load(object sender, System.EventArgs e) {
        timer1.Interval = 1000;
        timer1.Start();
        timer1.Enabled = true;
    }
    private void OnTimerElapsed(object sender, System.Timers.ElapsedEventArgs e) {
        label1.Text = DateTime.Now.ToString();
    }
}

new Timer(new TimerCallback(TimerHandler), null,0)

  
using System;        
using System.Threading;
public class MainClass
{
  public static AutoResetEvent A = new AutoResetEvent(false);
  public static int index = 0;
  
  public static int Main(){
    Timer T = new Timer(new TimerCallback(TimerHandler), null, 5000, 10000);
    A.WaitOne();
    Console.WriteLine("Main Thread event signaled");
    T.Dispose();
    return 0;
  }
  public static void TimerHandler(object state)
  {
    Console.WriteLine("TimerHandler");
    if (index == 5)
      A.Set();
    index++;
    Console.WriteLine(index);
  }
}

Timer.Elapsed

  

using System;
using System.Collections.Generic;
using System.Text;
using System.Timers;
class Program {
    static int counter = 0;
    static string displayString = "This string will appear one letter at a time. ";
    static void Main(string[] args) {
        Timer myTimer = new Timer(100);
        myTimer.Elapsed += new ElapsedEventHandler(WriteChar);
        myTimer.Start();
        Console.ReadKey();
    }
    static void WriteChar(object source, ElapsedEventArgs e) {
        Console.Write(displayString[counter++ % displayString.Length]);
    }
}

Timer.Interval

  
using System;
using System.Drawing;
using System.Windows.Forms;
   
class DigitalClock: Form
{
     public static void Main()
     {
          Application.Run(new DigitalClock());
     }
     public DigitalClock()
     {
          ResizeRedraw = true;
          Timer timer    = new Timer();
          timer.Tick    += new EventHandler(TimerOnTick);
          timer.Interval = 1000;
          timer.Start();
     }
     private void TimerOnTick(object obj, EventArgs ea)
     {
          Invalidate();
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          Graphics grfx    = pea.Graphics;
          DateTime dt      = DateTime.Now;
          string   strTime = dt.ToString("d") + "\n" + dt.ToString("T");
          SizeF    sizef   = grfx.MeasureString(strTime, Font);
          float    fScale  = Math.Min(ClientSize.Width  / sizef.Width,
                                      ClientSize.Height / sizef.Height);
          Font     font    = new Font(Font.FontFamily,
                                      fScale * Font.SizeInPoints);
   
          StringFormat strfmt = new StringFormat();
          strfmt.Alignment = strfmt.LineAlignment = StringAlignment.Center;
   
          grfx.DrawString(strTime, font, new SolidBrush(ForeColor), 
                          ClientRectangle, strfmt);
     }
}

Timer.Tick

  
using System;
using System.Drawing;
using System.Windows.Forms;
   
class CloseInFive: Form
{
     public static void Main()
     {
          Application.Run(new CloseInFive());
     }
     public CloseInFive()
     {
          Text = "Closing in Five Minutes";
   
          Timer timer    = new Timer();
          timer.Interval = 5 * 60 * 1000;
          timer.Tick    += new EventHandler(TimerOnTick);
          timer.Enabled  = true;
     }
     void TimerOnTick(object obj, EventArgs ea)
     {
          Timer timer = (Timer) obj;
   
          timer.Stop();
          timer.Tick -= new EventHandler(TimerOnTick);
   
          Close();          
     }
}