c#模拟登录获取Cookie

string contentUrl = "https://home.cnblogs.com/u/xinjian/";
            HttpWebRequest reqContent = (HttpWebRequest)WebRequest.Create(contentUrl);
            reqContent.Method = "GET";
            reqContent.AllowAutoRedirect = false;//服务端重定向。一般设置false
            reqContent.ContentType = "application/x-www-form-urlencoded";//数据一般设置这个值，除非是文件上传