/// <summary>
 /// 动态设置任务栏图标
 /// </summary>
 /// <param name="number"></param>
 public void SetTaskIconDynamic(string number)

 {

     //动态绘制图标样式

     Size size = this.Icon.Size;

     Bitmap cursorBitmap = new Bitmap(size.Width, size.Height);

     Graphics graphics = Graphics.FromImage(cursorBitmap);

     graphics.Clear(Color.FromArgb(, , , ));

     graphics.ResetClip();

     Rectangle rect = new Rectangle(, , size.Width, size.Height);

     //Gdi+自定义绘制图标

     graphics.DrawImage(this.Icon.ToBitmap(), rect);

     graphics.FillEllipse(new SolidBrush(Color.FromArgb(,,)), new Rectangle(rect.Width /  - , rect.Height /  - , rect.Width / , rect.Height / ));

     graphics.DrawString(number, this.Font, Brushes.White, new Rectangle(rect.Width /  - , rect.Height /  - , rect.Width / , rect.Height / ), new StringFormat()

      {

          LineAlignment = StringAlignment.Center,

          Alignment = StringAlignment.Center

      });

      //生成Icon

      Icon cursor = Icon.FromHandle(cursorBitmap.GetHicon());

      graphics.Dispose();

      cursorBitmap.Dispose();

      //更新任务栏图标样式

      this.Icon = cursor;

 }