The remote server returned an error: (403) Forbidden

 I am trying to do a http request  and getting a 403 error can someone please help as whats that I am missing. I have tried giving permission to everyone on the target site but of no use.
HttpWebRequest request = WebRequest.Create("http://localhost/telligent_community/api.ashx/v2/users/2") as HttpWebRequest;
using (HttpWebResponse webResponse = request.GetResponse() as HttpWebResponse)
    {
        var reader = new StreamReader(webResponse.GetResponseStream());
               
          Console.WriteLine(reader.ReadToEnd());
      }
...