2D Graphics C#

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
public class Form1 : System.Windows.Forms.Form{
   private System.ComponentModel.Container components = null;
   private Image theImage;
   private Image smallImage;
   public Form1() {
      InitializeComponent();
      SetStyle(ControlStyles.Opaque, true);
      theImage = new Bitmap("Winter.jpg");
      smallImage = new Bitmap(theImage,new Size(theImage.Width / 2, theImage.Height / 2));
   }
    protected override void OnPaint(PaintEventArgs e){
       Graphics g = e.Graphics;
       g.FillRectangle(Brushes.White, ClientRectangle);
       Brush tBrush = new TextureBrush(smallImage, new Rectangle(0, 0,smallImage.Width, smallImage.Height));
       g.FillEllipse(tBrush, ClientRectangle);
       tBrush.Dispose();
    }
     private void InitializeComponent() {
        this.components = new System.ComponentModel.Container();
        this.Size = new System.Drawing.Size(300,300);
        this.Text = "Form1";
     }
     static void Main() {
         Application.Run(new Form1());
     }
}