ASP.NET如何获取远程图片

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;

public partial class Default7 : System.Web.UI.Page
......{
    protected void Page_Load(object sender, EventArgs e)
    ......{
        string sRmFile = "http://zi.csdn.net/1000huawei.gif";
        string sSavePath = "c:@0huawei.gif";
        System.Net.WebClient wc = new System.Net.WebClient();
        try
        ......{
            wc.DownloadFile(sRmFile, sSavePath);
            Response.Write("远程文件已经下载完毕！");
        }
        catch (System.Exception ex)
        ......{
            Response.Write("error:" + ex.Message.ToString());
        }
    }
}