Mine

using System;
using System.Windows.Forms;
using System.Drawing;

class TestForm : Form
{
    protected override void OnPaint(PaintEventArgs ea)
    {
        base.OnPaint(ea);
        Graphics g    = ea.Graphics;

        Point center  = new Point(1 << 14, 1 << 14);
        int   length  = 100;
        Point topleft = new Point(center.X - length / 2, center.Y - length / 2);
        
        g.TranslateTransform(Width / 2 - center.X, Height / 2 - center.Y);
        g.DrawRectangle(new Pen(Color.Green), topleft.X, topleft.Y, length, length);
        g.DrawEllipse(new Pen(Color.Blue), topleft.X, topleft.Y, length, length);
    }

    protected override void OnResize(EventArgs ea)
    {
        base.OnResize(ea);
        Invalidate();
    }

    public static void Main(string[] args)
    {
        Application.Run(new TestForm());
    }
}