RoboWhois + C# example: get the WHOIS record for a domain.

gistfile1.cs

public string WhoIs(string domainName, string myApiKey)
{
  string url = "http://api.robowhois.com/whois/" + domainName;
  HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
  request.Method = WebRequestMethods.Http.Get;
  request.Credentials = new NetworkCredential(myApiKey, "X");

  try
  {
    WebResponse response = request.GetResponse();
    if (((HttpWebResponse)response).StatusCode == HttpStatusCode.OK)
    {
      Stream receiveStream = response.GetResponseStream();
      StreamReader readStream = new StreamReader(receiveStream, Encoding.UTF8);
      return readStream.ReadToEnd();
    }
    return "Could not connect to server or Api is wrong";
  }
  catch(System.Exception exc)
  {
    return "Could not connect to server or Api is wrong";
  }
}