问如何在c#中使用FRED Rest服务

EN

public void makeQRest() {
    try {
        string auth = "http://wit.istc.cnr.it/stlab-tools/fred/api";
        string body = "text=Miles Davis was an american jazz musician";
        IWebCredentials credentials = new Hammock.Authentication.Basic.BasicAuthCredentials {
            Username = Config.uName,
            Password = Config.pWord
        };

        RestClient client = new RestClient {
            Authority = auth,
        };
        client.AddHeader("content-type", "Accept: image/png");

        RestRequest request = new RestRequest {
            Credentials = credentials,
            Method = WebMethod.Post
        };
        request.AddPostContent(Encoding.UTF8.GetBytes(body));

        RestResponse response = client.Request(request);
        Console.WriteLine("the create Queue status is " + response.StatusCode);
        Console.WriteLine(response.Content);
        Console.ReadLine();
    } catch (Exception e) {
        Console.WriteLine(e.Message);
        Console.ReadLine();
    }
}