Attassa.OAuthLinkedIn.APIWebRequest C# (CSharp) Method

        public string APIWebRequest(string method, string url, string postData)
        {
            Uri uri = new Uri(url);
            string nonce = this.GenerateNonce();
            string timeStamp = this.GenerateTimeStamp();

            string outUrl, querystring;

            //Generate Signature
            string sig = this.GenerateSignature(uri,
                this.ConsumerKey,
                this.ConsumerSecret,
                this.Token,
                this.TokenSecret,
                method,
                timeStamp,
                nonce,
                null,
                out outUrl,
                out querystring);

            HttpWebRequest webRequest = null;

            webRequest = System.Net.WebRequest.Create(url) as HttpWebRequest;
            webRequest.Method = method;
            webRequest.Credentials = CredentialCache.DefaultCredentials;
            webRequest.AllowWriteStreamBuffering = true;

            webRequest.PreAuthenticate = true;
            webRequest.ServicePoint.Expect100Continue = false;
            ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3;

            webRequest.Headers.Add("Authorization", "OAuth realm=\"http://api.linkedin.com/\",oauth_consumer_key=\"" + this.ConsumerKey + "\",oauth_token=\"" + this.Token + "\",oauth_signature_method=\"HMAC-SHA1\",oauth_signature=\"" + HttpUtility.UrlEncode(sig) + "\",oauth_timestamp=\"" + timeStamp + "\",oauth_nonce=\"" + nonce + "\",oauth_verifier=\"" + this.Verifier + "\", oauth_version=\"1.0\"");

            if (postData != null)
            {
                byte[] fileToSend = Encoding.UTF8.GetBytes(postData);
                webRequest.ContentLength = fileToSend.Length;

                Stream reqStream = webRequest.GetRequestStream();

                reqStream.Write(fileToSend, 0, fileToSend.Length);
                reqStream.Close();
            }

            string returned = WebResponseGet(webRequest);

            return returned;
        }

 private void Profile_Click(object sender, RoutedEventArgs e)
 {
     try{
         txtOutput.Text += "\n" + _oauth.APIWebRequest("GET", "https://api.linkedin.com/v1/people/~", null);
     }
     catch (Exception exp)
     {
         txtOutput.Text += "\nException: " + exp.Message;
     }
 }