AjaxControlToolkit.TwitterAPI.Query C# (CSharp) Method

        string Query(string resourceUrl, IEnumerable<KeyValuePair<string, string>> parameters)
        {
            // oauth application keys
            var oAuthToken = ConfigurationManager.AppSettings["act:TwitterAccessToken"];
            var oAuthTokenSecret = ConfigurationManager.AppSettings["act:TwitterAccessTokenSecret"];
            var oAuthConsumerKey = ConfigurationManager.AppSettings["act:TwitterConsumerKey"];
            var oAuthConsumerSecret = ConfigurationManager.AppSettings["act:TwitterConsumerSecret"];

            // oauth implementation details
            const string oAuthVersion = "1.0";
            const string oAuthSignatureMethod = "HMAC-SHA1";
            const string method = "GET";

            // unique request details
            var oAuthNonce = Convert.ToBase64String(
                new ASCIIEncoding().GetBytes(DateTime.Now.Ticks.ToString(CultureInfo.InvariantCulture)));
            var timeSpan = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
            var oAuthTimestamp = Convert.ToInt64(timeSpan.TotalSeconds).ToString(CultureInfo.InvariantCulture);

            //setup the parameters that we will be putting in the authorization
            var authorizationParameters = new List<KeyValuePair<string, string>> {
                new KeyValuePair<String, String>("oauth_consumer_key", oAuthConsumerKey),
                new KeyValuePair<String, String>("oauth_nonce", oAuthNonce),
                new KeyValuePair<String, String>("oauth_signature_method", oAuthSignatureMethod),
                new KeyValuePair<String, String>("oauth_timestamp", oAuthTimestamp),
                new KeyValuePair<String, String>("oauth_token", oAuthToken),
                new KeyValuePair<String, String>("oauth_version", oAuthVersion)
            };

            //combine and sort all parameters as per https://dev.twitter.com/docs/auth/creating-signature
            var allParameters = authorizationParameters.Union(parameters.ToArray()).OrderBy(tmp => tmp.Key);

            //put all paramneters into a & delimited string and make sure our values are % escaped
            var baseString = String.Join("&",
                allParameters.Select(p => String.Format("{0}={1}", p.Key, Uri.EscapeDataString(p.Value))).ToArray());

            //finish the base string
            baseString = String.Format("{0}&{1}&{2}", method, Uri.EscapeDataString(resourceUrl),
                Uri.EscapeDataString(baseString));

            var compositeKey = String.Format("{0}&{1}", Uri.EscapeDataString(oAuthConsumerSecret),
                Uri.EscapeDataString(oAuthTokenSecret));

            //use our composite key to get the auth signature
            String oAuthSignature;
            using(var hash = new HMACSHA1(Encoding.ASCII.GetBytes(compositeKey))) {
                oAuthSignature = Convert.ToBase64String(hash.ComputeHash(Encoding.ASCII.GetBytes(baseString)));
            }

            // create the request header
            const string headerFormat = "OAuth oauth_nonce=\"{0}\", oauth_signature_method=\"{1}\", " +
                                        "oauth_timestamp=\"{2}\", oauth_consumer_key=\"{3}\", " +
                                        "oauth_token=\"{4}\", oauth_signature=\"{5}\", " +
                                        "oauth_version=\"{6}\"";

            //get the actual string version of the auth header and its values
            var authHeader = String.Format(headerFormat,
                Uri.EscapeDataString(oAuthNonce),
                Uri.EscapeDataString(oAuthSignatureMethod),
                Uri.EscapeDataString(oAuthTimestamp),
                Uri.EscapeDataString(oAuthConsumerKey),
                Uri.EscapeDataString(oAuthToken),
                Uri.EscapeDataString(oAuthSignature),
                Uri.EscapeDataString(oAuthVersion));

            ServicePointManager.Expect100Continue = false;

            //add our query string parameters to our url
            var parameterString = String.Join("&",
                parameters.Select(p => String.Format("{0}={1}", p.Key, Uri.EscapeDataString(p.Value))).ToArray());
            resourceUrl += "?" + parameterString;

            //create our request
            var request = (HttpWebRequest)WebRequest.Create(resourceUrl);

            //set our info
            request.Headers.Add("Authorization", authHeader);
            request.Method = method;
            request.ContentType = "application/x-www-form-urlencoded";

            //get the response and return the result from the stream
            using(var response = (HttpWebResponse)request.GetResponse()) {
                using(var reader = new StreamReader(response.GetResponseStream())) {
                    return reader.ReadToEnd();
                }
            }
        }