使用HttpWebRequest调用wcf一段代码

 public class HttpClass
    {
        internal static HttpWebRequest _httpWebRequest;
        public static void Request()
        {
            _httpWebRequest = null;
            _httpWebRequest = (HttpWebRequest)WebRequest.Create("http://wcf.open.cnblogs.com/blog/sitehome/paged/1/2");
            _httpWebRequest.Method = "GET";
            _httpWebRequest.BeginGetResponse((result) => ResponseCallback(result), _httpWebRequest);
        }
        static object _obj = new object();
        internal static void ResponseCallback(IAsyncResult result)
        {
            HttpWebRequest request = (HttpWebRequest)result.AsyncState;
            HttpWebResponse httpWebResponse;
            try
            {
                httpWebResponse = (HttpWebResponse)request.EndGetResponse(result);
            }
            catch (WebException we)
            {

                return;
            }
            if (httpWebResponse != null)
            {
                lock (_obj)
                {
                    using (var stream = httpWebResponse.GetResponseStream())
                    {
                        try
                        {
                            XmlSerializer ser = null;
                            object obj = null;
                            ser = new XmlSerializer(typeof(NewsFeed));

                            obj = ser.Deserialize(stream);
                        }
                        catch (Exception se)
                        {

                            return;
                        }
                    }
                }
            }
        }
    }