RestSharp Simple REST and HTTP API Client for .NET

var client = new RestClient("http://example.com");
// client.Authenticator = new HttpBasicAuthenticator(username, password);
 
var request = new RestRequest("resource/{id}", Method.POST);
request.AddParameter("name", "value"); // adds to POST or URL querystring based on Method
request.AddUrlSegment("id", ""); // 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);
 
// execute the request
IRestResponse 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<Person> response2 = client.Execute<Person>(request);
var name = response2.Data.Name;
 
// easy async support
client.ExecuteAsync(request, response => {
    Console.WriteLine(response.Content);
});
 
// async with deserialization
var asyncHandle = client.ExecuteAsync<Person>(request, response => {
    Console.WriteLine(response.Data.Name);
});
 
// abort the request on demand
asyncHandle.Abort();