C# Winform简单的控件重绘

//重绘Checkbox，支持自定义图标

public class CoCheckBox : CheckBox
    {
   
        public CoCheckBox() : base()
        {
   
            //3.获取image路径
            //DirectoryInfo di = new DirectoryInfo(string.Format(@"{0}..\..\image", Application.StartupPath));
            //string imagePath = string.Format(@"{0}..\..\image\", Application.StartupPath);
            string imagePath = @"C:\Users\张伟涛\Documents\visual studio 2015\Projects\RedrawControls\RedrawControls\image";
            ImageList imgs = new ImageList();
            imgs.Images.Add("T", Image.FromFile(imagePath + "\\Check.png"));
            imgs.Images.Add("F", Image.FromFile(imagePath + "\\NoCheck.png"));

            this.FlatStyle = FlatStyle.Flat;
            this.Appearance = Appearance.Button;
            this.ImageList = imgs;
            this.FlatAppearance.BorderColor = SystemColors.Control;
            this.FlatAppearance.CheckedBackColor = SystemColors.Control;
            this.Font = new Font("华文新魏", 9f, FontStyle.Bold);
            this.Checked = false;
            this.ImageKey = "F";
            this.ImageAlign = ContentAlignment.MiddleLeft;
            this.TextAlign = ContentAlignment.MiddleRight;
            this.AutoSize = false;
        }

        protected override void OnCheckedChanged(EventArgs e)
        {
   
            base.OnCheckedChanged(e);
            if (this.Checked)
            {
   
                this.ImageKey = "T";
            }
            else
            {
   
                this.ImageKey = "F";
            }
        }
    }
//重绘RadioButton，支持自定义图标
    public class CoRadioButton : RadioButton
    {
   
        public CoRadioButton() : base()
        {
   
            string imagePath = @"C:\Users\张伟涛\Documents\visual studio 2015\Projects\RedrawControls\RedrawControls\image";
            ImageList imgs = new ImageList(<