互联网上关于.NET(C#)的HTTP相关的辅助类还是比较多的，这里再为大家推荐一个.NET的HTTP辅助类，它叫RestSharp。RestSharp是一个轻量的，不依赖任何第三方的组件或者类库的Http的组件。RestSharp具有以下的优点：

支持.NET 3.5+,Silverlight 4, Windows Phone 7, Mono, MonoTouch, Mono for Android, Compact Framework 3.5等

通过NuGet方便引入到任何项目 ( Install-Package restsharp )

可以自动反序列化XML和JSON

支持自定义的序列化与反序列化

自动检测返回的内容类型

支持HTTP的GET, POST, PUT, HEAD, OPTIONS, DELETE等操作

可以上传多文件

支持oAuth 1, oAuth 2, Basic, NTLM and Parameter-based Authenticators等授权验证等

支持异步操作

极易上手并应用到任何项目中

以上是RestSharp的主要特点，通用它你可以很容易地用程序来处理一系列的网络请求(GET, POST, PUT, HEAD, OPTIONS, DELETE)，并得到返回结果。 最后是官方的应用示例，就是如下这么简单：

var client = new RestClient("http://example.com");

// client.Authenticator = new HttpBasicAuthenticator(username, password);

var request = new RestRequest("resource/{id}", Method.POST);

request.AddUrlSegment("id", "123"); // replaces matching token in request.Resource

// easily add HTTP Headers

request.AddHeader("header", "value");

// add files to upload (works with compatible verbs)

request.AddFile(path);

var postdata = new

{

username = "yanyangtian",

password = "123456",

nickname = "艳阳天"

};

var json = request.JsonSerializer.Serialize(postdata);

request.AddParameter("application/json; charset=utf-8", json, ParameterType.RequestBody);

// execute the request

RestResponse response = client.Execute(request);

var content = response.Content; // raw content as string

// or automatically deserialize result

// return content type is sniffed but can be explicitly set via RestClient.AddHandler();

RestResponse response2 = client.Execute(request);

var name = response2.Data.Name;

// easy async support

client.ExecuteAsync(request, response => {

Console.WriteLine(response.Content);

});

// async with deserialization

var asyncHandle = client.ExecuteAsync(request, response => {

Console.WriteLine(response.Data.Name);

});

// abort the request on demand

asyncHandle.Abort();