当前路径：Cool.Windows.Forms/CoolButton.cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Cool.Windows.Forms
{
    public class CoolButton : Control
    {
        public CoolButton()
        {
            this.SetStyle(
                 //ControlStyles.UserPaint |//使用自定义的绘制方式
                 ControlStyles.ResizeRedraw//当控件大小发生变化时就重新绘制
                | ControlStyles.SupportsTransparentBackColor//则控件接受 alpha 组件数小于 255 个的 BackColor 来模拟透明度
                | ControlStyles.AllPaintingInWmPaint//则控件忽略窗口消息 WM_ERASEBKGND 以减少闪烁
                | ControlStyles.OptimizedDoubleBuffer //则控件将首先绘制到缓冲区而不是直接绘制到屏幕，这可以减少闪烁
                | ControlStyles.DoubleBuffer
                , true);
            this.Size = new Size(140, 38);
            borderRect = new Rectangle(0, 0, this.Width - 1, this.Height - 1);
            this.BackColor = Color.Transparent;
        }
        #region 属性

        private CoolButtonStyle _coolStyle;
        [System.ComponentModel.Browsable(true), DefaultValue(CoolButtonStyle.Normal)]
        public CoolButtonStyle CoolStyle
        {
            get => _coolStyle;
            set
            {
                _coolStyle = value;
                this.Invalidate();
            }
        }

        private Color _borderColor = Color.FromArgb(0, 163, 129);
        [System.ComponentModel.Browsable(true)]
        [System.ComponentModel.DefaultValue(typeof(Color), "0, 163, 129")]
        public Color BorderColor
        {
            get => _borderColor;
            set
            {
                _borderColor = value;
                this.Invalidate();
            }
        }

        private int _borderWidth = 1;
        [System.ComponentModel.Browsable(true)]
        [System.ComponentModel.DefaultValue(typeof(int), "1")]
        public int BorderWidth
        {
            get => _borderWidth;
            set
            {
                _borderWidth = value;
                this.Invalidate();
            }
        }

        private Image _image;
        [System.ComponentModel.Browsable(true)]
        [System.ComponentModel.DefaultValue(typeof(Image), "Properties.Resources.ButtonImage")]
        public Image Image
        {
            ...