using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

using System.Drawing.Drawing2D;
using System.Drawing.Imaging;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            const int w = 640;
            const int h = 480;
            Bitmap bmp1 = new Bitmap(w, h, PixelFormat.Format32bppArgb);
            using (Graphics g = Graphics.FromImage(bmp1))
            {
                g.SmoothingMode = SmoothingMode.AntiAlias;
                g.FillRectangle(Brushes.Transparent, 0, 0, w, h);
                g.FillEllipse(Brushes.Blue, 0, 0, w, h);
            }
            Bitmap bmp2 = new Bitmap(w, h, PixelFormat.Format32bppArgb);
            using (Graphics g = Graphics.FromImage(bmp2))
            {
                g.SmoothingMode = SmoothingMode.AntiAlias;
                g.FillRectangle(Brushes.Gray, 0, 0, w, h);

                Matrix m = new Matrix();
                m.Scale(0.5f, 0.5f);
                g.Transform = m;

                g.DrawImage(bmp1,0,0);

                m.Reset();
                g.Transform = m;
            }
            PictureBox p = new PictureBox();
            p.Dock = DockStyle.Fill;
            this.Controls.Add(p);
            this.ClientSize = new Size(w, h);
            p.Image = bmp2;
        }
    }
}