c# HttpWebRequest post和get請求http

public class HttpUtility
    {
        /// <summary>
        /// Get方式獲取Http請求
        /// </summary>
        /// <param name="Url">請求地址</param>
        /// <param name="Encode">編碼方式</param>
        /// <returns>請求內容</returns>
        public string UrlGet(string Url, string Encode)
        {

            try
            {
                HttpWebRequest wReq = (HttpWebRequest)WebRequest.Create(Url);
                HttpWebResponse wResp = (HttpWebResponse)wReq.GetResponse();
                Stream respStream = wResp.GetResponseStream();
                using (StreamReader reader = new StreamReader(respStream, Encoding.GetEncoding(Encode)))
                {
                    return reader.ReadToEnd();
                }
            }
            catch (Exception ex)
            {
                return ex.Message;
            }
        }

        /// <summary>
        /// Post方式請求Http
        /// </summary>
        /// <param name="URL">請求的地址</param>
        /// <param name="strPostdata">請求參數</param>
        /// <param name="Encode">編碼方式</param>
        /// <returns>請求內容</returns>
        public string UrlPost(string URL, string strPostdata, string Encode)
        {
            try
            {
                Encoding encoding = Encoding.Default;
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(URL);
                request.Method = "post";
                request.Accept = "text/html, application/xhtml+xml, */*";
                request.ContentType = "application/x-www-form-urlencoded";
                byte[] buffer = encoding.GetBytes(strPostdata);
                request.ContentLength = buffer.Length;
                request.GetRequestStream().Write(buffer, 0, buffer.Length);
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                using (StreamReader reader = new StreamReader(response.GetResponseStream(), System.Text.Encoding.GetEncoding(Encode)))
                {
                    return reader.ReadToEnd();
                }
            }
            catch (Exception ex)
            {
                return ex.Message;
            }
        }
    }