图片只显示了一半？为什么？

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.Net;


using System.IO;




public partial class img : System.Web.UI.Page




...{


protected void Page_Load(object sender, EventArgs e)




...{










WebRequest request = WebRequest.Create("http://bbs.rulaionline.com/RLVerifyCode.aspx");


// If required by the server, set the credentials.


request.Credentials = CredentialCache.DefaultCredentials;


// Get the response.


HttpWebResponse response = (HttpWebResponse)request.GetResponse();




//int Length = int.Parse(response.ContentLength.ToString());






// Display the status.


Console.WriteLine(response.StatusDescription);


// Get the stream containing content returned by the server.


Stream dataStream = response.GetResponseStream();


//int Length = 10000000;


// Open the stream using a StreamReader for easy access.


//===========================




int read=0;


byte[] Content = new byte[8080];


BinaryReader reader = new BinaryReader(dataStream);






reader.Read(Content, 0, Content.Length);






Response.BinaryWrite(Content);


















//===========================


//byte[] Content = new byte[Length];


//dataStream.Read(Content, 0, Length);




//输出到页面




//Response.BinaryWrite(Content);//图片数据












//StreamReader reader = new StreamReader(dataStream);


// Read the content.


//string responseFromServer = reader.ReadToEnd();


// Display the content.


//Response.Write(responseFromServer);


//Response.Write(dataStream);


// Cleanup the streams and the response.


reader.Close();


dataStream.Close();


response.Close();




}


}