GUI Windows Form C#

/*
User Interfaces in C#: Windows Forms and Custom Controls
by Matthew MacDonald
Publisher: Apress
ISBN: 1590590457
*/
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Drawing.Drawing2D;
namespace IrregularlyShapedForms
{
    /// 
    /// Summary description for IrregularlyShapedForms2.
    /// 

    public class IrregularlyShapedForms2 : System.Windows.Forms.Form
    {
        internal System.Windows.Forms.Button Button1;
        /// 
        /// Required designer variable.
        /// 

        private System.ComponentModel.Container components = null;
        public IrregularlyShapedForms2()
        {
            //
            // Required for Windows Form Designer support
            //
            InitializeComponent();
            //
            // TODO: Add any constructor code after InitializeComponent call
            //
        }
        /// 
        /// Clean up any resources being used.
        /// 

        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if(components != null)
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }
        #region Windows Form Designer generated code
        /// 
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// 

        private void InitializeComponent()
        {
            this.Button1 = new System.Windows.Forms.Button();
            this.SuspendLayout();
            // 
            // Button1
            // 
            this.Button1.Location = new System.Drawing.Point(20, 24);
            this.Button1.Name = "Button1";
            this.Button1.Size = new System.Drawing.Size(136, 36);
            this.Button1.TabIndex = 1;
            this.Button1.Text = "Button1";
            // 
            // IrregularlyShapedForms2
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(292, 266);
            this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                          this.Button1});
            this.Name = "IrregularlyShapedForms2";
            this.Text = "Shaped Form";
            this.Load += new System.EventHandler(this.IrregularlyShapedForms2_Load);
            this.ResumeLayout(false);
        }
        #endregion
        [STAThread]
        static void Main() 
        {
            Application.Run(new IrregularlyShapedForms2());
        }
        private void IrregularlyShapedForms2_Load(object sender, System.EventArgs e)
        {
            GraphicsPath path = new GraphicsPath();
            path.AddEllipse(0, 0, this.Width / 2, this.Height / 2);
            path.AddRectangle(new Rectangle(this.Width / 2, this.Top / 2, this.Width / 2, this.Top / 2));
            path.AddEllipse(this.Width / 2, this.Height / 2, this.Width / 2, this.Height / 2);
            this.Region = new Region(path);
        }
    }
}