关于设置校验码字体颜色的问题

各位老师，下面是我搞到的校验码例程，但我不知道设置校验码字体颜色的代码在那里，看了半天好像没有，请各位老师指点一下校验码字体颜色如何设置
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.Drawing.Text;
using System.Drawing;
using System.Text;public partial class ValidateImage : System.Web.UI.Page
{
    private readonly string ImagePath = "Images/Validator.jpg";
    private string sValidator = "";
private Brush[] BrushList = new Brush[32];     private void Page_Load(object sender, System.EventArgs e)
    {
///初始化
InitBrushList(); if(Request.Params["Validator"] != null)
{
///获取验证字符串
sValidator = Request.Params["Validator"].ToString();
}        ///创建Bmp位图
        Bitmap bitMapImage = new System.Drawing.Bitmap(Server.MapPath(ImagePath));
        Graphics graphicImage = Graphics.FromImage(bitMapImage);        ///设置画笔的输出模式
        graphicImage.SmoothingMode = SmoothingMode.AntiAlias;
        ///添加文本字符串
        ///
  
for(int i = 0; i < sValidator.Length; i++)
{       graphicImage.DrawString(sValidator[i].ToString(),
                                    new Font("Arial", 25, (FontStyle)CreateRandomFontStyle(GetRandomint(0, 1000))),
                                    BrushList[GetRandomint(0, BrushList.Length - 1)],
                                    new PointF(i * 20, GetRandomint(-5, 5)));      
}
 
//graphicImage.DrawString(sValidator, new Font("Arial", 20, (FontStyle)GetRandomint(0,4)),SystemBrushes.WindowText, new Point(0, 0));        ///设置图像输出的格式
        Response.ContentType = "image/jpeg";        ///保存数据流
        bitMapImage.Save(Response.OutputStream, ImageFormat.Jpeg);        ///释放占用的资源
        graphicImage.Dispose();
        bitMapImage.Dispose();
Response.End();
    }

/// <summary>
/// 创建一个随机数
/// </summary>
/// <param name="min"></param>
/// <param name="max"></param>
/// <returns></returns>
private int GetRandomint(int min,int max)
{
Random random = new Random();
return (random.Next(min,max));
} private int CreateRandomFontStyle(int random)
{
if(random < 200)
{
return 0;
}
if(random < 400)
{
return 1;
}
if(random < 600)
{
return 2;
}
if(random < 800)
{
return 3;
}
if(random < 1000)
{
return 4;
}
return 4;
} /// <summary>
/// 初始化Brush列表
/// </summary>
private void InitBrushList()
{
BrushList[0] = SystemBrushes.ActiveBorder;
BrushList[1] = SystemBrushes.ActiveCaption;
BrushList[2] = SystemBrushes.ActiveCaptionText;
BrushList[3] = SystemBrushes.AppWorkspace;
BrushList[4] = SystemBrushes.ButtonFace;
BrushList[5] = SystemBrushes.ButtonHighlight;
BrushList[6] = SystemBrushes.ButtonShadow;
BrushList[7] = SystemBrushes.Control;
BrushList[8] = SystemBrushes.ControlDark;
BrushList[9] = SystemBrushes.ControlDarkDark;
BrushList[10] = SystemBrushes.ControlLight;
BrushList[11] = SystemBrushes.ControlText;
BrushList[12] = SystemBrushes.Desktop;
BrushList[13] = SystemBrushes.GradientActiveCaption;
BrushList[14] = SystemBrushes.GradientInactiveCaption;
BrushList[15] = SystemBrushes.GrayText;
BrushList[16] = SystemBrushes.Highlight;
BrushList[17] = SystemBrushes.HighlightText;
BrushList[18] = SystemBrushes.HotTrack;
BrushList[19] = SystemBrushes.InactiveBorder;
BrushList[20] = SystemBrushes.InactiveCaption;
BrushList[21] = SystemBrushes.InactiveCaptionText;
BrushList[22] = SystemBrushes.Info;
BrushList[23] = SystemBrushes.InfoText;
BrushList[24] = SystemBrushes.Menu;
BrushList[25] = SystemBrushes.MenuBar;
BrushList[26] = SystemBrushes.MenuHighlight;
BrushList[27] = SystemBrushes.MenuText;
BrushList[28] = SystemBrushes.ScrollBar;
BrushList[29] = SystemBrushes.Window;
BrushList[30] = SystemBrushes.WindowFrame;
BrushList[31] = SystemBrushes.WindowText;
}
}