RestSharp简介
RestSharp是一个轻量级HTTP客户端库，主要功能是通过HTTP对远程资源进行同步异步调用，可将请求主体序列化为JSON或XML并反序列化相应。
请求主体的方式：JSON、XML和表单数据
参数类型：查询、URL段、标头、cookie、正文
官方的例子如下：
using RestSharp;
using RestSharp.Authenticators;var client = new RestClient("https://api.twitter.com/1.1") {Authenticator = new HttpBasicAuthenticator("username", "password")
};
var request = new RestRequest("statuses/home_timeline.json");
var response = await client.GetAsync(request, cancellationToken);实例代码：
RestClient client = new RestClient(urlFilterTra);RestRequest request = new RestRequest(Method.POST);client.Timeout = m_Timeout;request.AddHeader("Content-Type", "application/json");byte[] json_buf = Encoding.UTF8.GetBytes(jsonData);jsonData = Encoding.UTF8.GetString(json_buf, 0, json_buf.Length);request.AddParameter("application/json", jsonData, ParameterType.RequestBody);IRestResponse response = client.Execute(request);string resultStr = response.Content;list_result.Clear();//反序列化FiltrationRcvInfo filteRcvInfo=JsonConvert.DeserializeObject<FiltrationRcvInfo>(resultStr);