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Simple Clock

using System; using System.Drawing; using System.Windows.Forms;     class SimpleClock: Form {      public static void Main()      {           Application.Run(new SimpleClock());      }      public SimpleClock()      {           Timer timer    = new Timer();           timer.Tick    += new EventHandler(TimerOnTick);           timer.Interval = 1000;           timer.Start();      }      private void TimerOnTick(object sender, EventArgs ea)      {           Invalidate();      }      protected override void OnPaint(PaintEventArgs pea)      {           StringFormat strfmt  = new StringFormat();           strfmt.Alignment     = StringAlignment.Center;           strfmt.LineAlignment = StringAlignment.Center;               pea.Graphics.DrawString(DateTime.Now.ToString("F"),                                   Font, new SolidBrush(ForeColor),                                    ClientRectangle, strfmt);      } }