这是个动态生成图片页面,但无法显示,提示无法显示 XML 页。 什么原因啊该如何处理

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;public partial class VerifyCode : System.Web.UI.Page{    protected void Page_Load(object sender, System.EventArgs e)    {        Session["VerifyCode"] = MakeValidateCode();        CreateImage(Session["VerifyCode"].ToString());    }    private void CreateImage(string checkCode)    {        int iwidth = (int)(checkCode.Length * 12) + 10;        System.Drawing.Bitmap image = new System.Drawing.Bitmap(iwidth, 25);        Graphics g = Graphics.FromImage(image);        g.Clear(Color.White);        //定义颜色        Color[] c = { Color.Black, Color.Red, Color.DarkBlue, Color.Green, Color.Orange, Color.Brown, Color.DarkCyan, Color.Purple };        //定义字体        string[] font = { "Verdana", "Microsoft Sans Serif", "Comic Sans MS", "Arial", "宋体" };        Random rand = new Random();        //随机输出噪点        for (int i = 0; i < 5; i++)        {            int x = rand.Next(image.Width);            int y = rand.Next(image.Height);            g.DrawRectangle(new Pen(Color.LightGray, 0), x, y, 1, 1);        }        //输出不同字体和颜色的验证码字符        for (int i = 0; i < checkCode.Length; i++)        {            int cindex = rand.Next(7);            int findex = rand.Next(5);            Font f = new System.Drawing.Font("宋体", 12, System.Drawing.FontStyle.Regular);            Brush b = new System.Drawing.SolidBrush(c[cindex]);            int ii = 4;            if ((i + 1) % 2 == 0)            {                ii = 2;            }            g.DrawString(checkCode.Substring(i, 1), f, b, 3 + (i * 12), ii);        }        //画一个边框        g.DrawRectangle(new Pen(Color.Black, 0), 0, 0, image.Width - 1, image.Height - 1);        //输出到浏览器        System.IO.MemoryStream ms = new System.IO.MemoryStream();        image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);        Response.ClearContent();        Response.ContentType = "image/Jpeg";        Response.BinaryWrite(ms.ToArray());        g.Dispose();        image.Dispose();    }    private string MakeValidateCode()    {        //0 i o        char[] s = new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'J', 'K', 'L', 'M', 'N', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z' };        string num = "";        Random r = new Random();        for (int i = 0; i < 4; i++)        {            num += s[r.Next(0, s.Length - 1)].ToString();        }        return num;    }}