private void button1_MouseEnter(object sender, EventArgs e)
        {
            this.button1.Image = Image.FromFile(@"images/背景圖片001.jpg");
        }

        private void button1_MouseLeave(object sender, EventArgs e)
        {
            this.button1.Image = Image.FromFile(@"images/背景圖片003.jpg");
        }

　　  //重寫父類的Text屬性
        public override string Text
        {
            get
            {
                return button1.Text;
            }
            set
            {
                button1.Text = value;
            }
        }

　　  //自定義一個屬性
        [Category("自定義"), Description("顯示文本內容")]
        public string age
        {
            get { return "aaa"; }
            set { button1.Text = value; }
        }