C# 运行URL并获取新链接

我想运行一个URL并得到结果。 我使用了下面的代码，但它不能正常工作。它只返回主网站URL作为结果。 这是一个有一个蓝色框的main，称为filenext。我得到了它的链接，这就是我想要得到的结果

                    WebClient client = new WebClient();
                    client.Headers.Add("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.0.3705;)");
                    WebClient getNitroflareLink = new WebClient();


                    HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
                    HttpWebResponse response = request.GetResponse() as HttpWebResponse;
                    Stream stream = response.GetResponseStream();

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您应该从第一个URL为第二个URL设置

Referer

        var page = firstLink.LoadIt();
            HttpWebRequest request = WebRequest.Create(Refererlink) as HttpWebRequest;
            request.UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.113 Safari/537.36";
            request.Referer = firstLink;
            using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)