WebService调用方法

private static string HttpClientRequest(string uri, List<KeyValuePair<string, string>> paramList)
        {
            HttpClient httpClient = new HttpClient();
            httpClient.MaxResponseContentBufferSize = 256000;
            httpClient.DefaultRequestHeaders.Add("user-agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/36.0.1985.143 Safari/537.36");
            HttpResponseMessage response = httpClient.PostAsync(new Uri(uri), new FormUrlEncodedContent(paramList)).Result;
            string result = response.Content.ReadAsStringAsync().Result;
            //用完要记得释放
            httpClient.Dispose();
            return result;
        }