using System;
using System.Windows.Forms;
using System.Drawing;
using System.Drawing.Drawing2D;
class Joonis7:Form{
  protected override void OnResize(EventArgs e){
     base.OnResize(e);
     this.Invalidate();
  }
  protected override void OnPaint(PaintEventArgs e){
    base.OnPaint(e);
    Graphics g=e.Graphics;
    g.DrawEllipse(new Pen(Color.Green), 0, 0, this.Width, this.Height);
  }
  public static void Main(string[] arg){
     Application.Run(new Joonis7());   
  }
}