请问怎么获取网址

http://s.click.taobao.com/t?e=zGU34CA7K%2BPkqB07S4%2FK0CFcRfH0GoT805sipKj3WFgObCOjeMxxCTFxN6Vm7j4ewiKkN9jps1h0xwpsosUSBTJl%2Bsn9DQ1mMZl%2BUXg0Gj6BRg%3D%3D

打开以上的淘宝客链接，会经过跳转，最后跳到以下的链接，在asp.net里怎么取得这个链接地址

http://detail.tmall.com/item.htm?id=12730886528&ali_trackid=2:mm_26282330_0_0:1365997719_410_699961681

------解决方案--------------------
看了一下，不是JS中转，就是 Response中头信息的Locatoin
------解决方案--------------------

            var request = HttpWebRequest.Create("http://s.click.taobao.com/t?e=zGU34CA7K%2BPkqB07S4%2FK0CFcRfH0GoT805sipKj3WFgObCOjeMxxCTFxN6Vm7j4ewiKkN9jps1h0xwpsosUSBTJl%2Bsn9DQ1mMZl%2BUXg0Gj6BRg%3D%3D");
            var response = request.GetResponse();
            var url = response.Headers["Location"];
------解决方案--------------------
可以结贴给分了

    public class GHtmlToImage

    {

        /// <summary>

        /// 地址

        /// </summary>

        private string _url = "about:blank";

        /// <summary>

        /// 宽

        /// </summary>

        private int _width = 800;

        /// <summary>

        /// 高

        /// </summary>

        private int _height = 600;

        /// <summary>

        /// 缩略图宽

        /// </summary>

        private int _swidth = 320;

        /// <summary>

        /// 缩略图高

        /// </summary>

        private int _sheight = 250;



        private Bitmap _image;

        private Bitmap _thumbnailimage;

        private object _lock = new object();

        private object _lock2 = new object();

        private string _charset = "utf-8";

        public string Url

        {

            set { _url = value; }

        }

        public int Width