//设置请求接口

var request = (HttpWebRequest)WebRequest.Create("http://xxx.com/xxx");

//请求参数

var postData = string.Format("appId={0}&appScreat={1}&channel={2}", appId, appScreat, channel);

var data = Encoding.ASCII.GetBytes(postData);

//请求方式

request.Method = "POST";

//请求头参数设置

request.Headers.Add("sign", sign);

request.Headers.Add("timestamp", timestamp);

request.Headers.Add("token", token);

request.ContentType = "application/x-www-form-urlencoded";

request.ContentLength = data.Length;

using (var stream = request.GetRequestStream())

{

    stream.Write(data, , data.Length);

}

//结果返回

var response = (HttpWebResponse)request.GetResponse();

//转字符串

var responseString = new StreamReader(response.GetResponseStream()).ReadToEnd();

//转换为json对象

MXCZUserInfoResponse userInfoResponse = JsonConvert.DeserializeObject<MXCZUserInfoResponse>(responseString);