C#带cookie Post和Get方式发送数据

 #region 同步通过POST方式发送数据
       /// <summary>
       /// 通过POST方式发送数据
       /// </summary>
       /// <param name="Url">url</param>
       /// <param name="postDataStr">Post数据</param>
       /// <param name="cookie">Cookie容器</param>
       /// <returns></returns>
       public string SendDataByPost(string Url,string postDataStr,ref CookieContainer cookie)
       {
         HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
         if (cookie.Count == 0)
         {
            request.CookieContainer = new CookieContainer();
            cookie = request.CookieContainer;
         }
         else
         {
            request.CookieContainer = cookie;
         }

         request.Method = "POST";
         request.ContentType = "application/x-www-form-urlencoded";
         request.ContentLength = postDataStr.Length;
         Stream myRequestStream = request.GetRequestStream();
         StreamWriter myStreamWriter = new StreamWriter(myRequestStream, Encoding.GetEncoding("gb2312"));
         myStreamWriter.Write(postDataStr);
         myStreamWriter.Close();

         HttpWebResponse response = (HttpWebResponse)request.GetResponse();
         Stream myResponseStream = response.GetResponseStream();
         StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
         string retString= myStreamReader.ReadToEnd();
         myStreamReader.Close();
         myResponseStream.Close();

         return retString;
       }
       #endregion

       #region 同步通过GET方式发送数据
       /// <summary>
       /// 通过GET方式发送数据
       /// </summary>
       /// <param name="Url">url</param>
       /// <param name="postDataStr">GET数据</param>
       /// <param name="cookie">GET容器</param>
       /// <returns></returns>
       public string SendDataByGET(string Url, string postDataStr, ref CookieContainer cookie)
       {
         HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url +( postDataStr == "" ? "" : "?") + postDataStr);
         if (cookie.Count == 0)
         {
            request.CookieContainer = new CookieContainer();
            cookie = request.CookieContainer;
         }
         else
         {
            request.CookieContainer = cookie;
         }

         request.Method = "GET";
         request.ContentType = "text/html;charset=UTF-8";
         
         HttpWebResponse response = (HttpWebResponse)request.GetResponse();
         Stream myResponseStream = response.GetResponseStream();
         StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
         string retString = myStreamReader.ReadToEnd();
         myStreamReader.Close();
         myResponseStream.Close();

         return retString;
       }
       #endregion