public void FilterTest()
        {
            OAuthTokens tokens = Configuration.GetTokens();

            stream = new TwitterStream(tokens);
            stream.OnStatusReceived += new TwitterStatusReceivedHandler(stream_OnStatus);

            FilterStreamOptions options = new FilterStreamOptions();
            options.Track.Add("twit_er_izer");
            options.Track.Add("twitterizer");
            
            stream.StartFilterStream(options);

            for (int i = 0; i < 1000; i++)
            {
                System.Threading.Thread.Sleep(100);    
            }
            
            stream.EndStream();
        }
        /// <summary>
        /// Starts the filter stream. Returns public statuses that match one or more filter predicates.
        /// </summary>
        /// <param name="options">The options.</param>
        public void StartFilterStream(FilterStreamOptions options)
        {
            if (options == null)
            {
                throw new ArgumentNullException("options");
            }

            StringBuilder uriBuilder = new StringBuilder();
            if (options.UseSSL)
                uriBuilder.Append("https://");
            else
                uriBuilder.Append("http://");

            uriBuilder.Append("stream.twitter.com/1/statuses/filter.json?");

            if (options.Count != 0)
            {
                uriBuilder.AppendFormat("count={0}&", options.Count);
            }

            if (options.Follow != null && options.Follow.Count > 0)
            {
                uriBuilder.AppendFormat("follow={0}&", string.Join(",", options.Follow.ToArray()));
            }

            if (options.Track != null && options.Track.Count > 0)
            {
                uriBuilder.AppendFormat("track={0}&", string.Join(",", options.Track.ToArray()));
            }

            if (options.Locations != null && options.Locations.Count > 0)
            {
                uriBuilder.Append("locations=");

                foreach (Location location in options.Locations)
                {
                    uriBuilder.AppendFormat("{0},", location.ToString());
                }

                uriBuilder = uriBuilder.Remove(uriBuilder.Length - 1, 1);
            }

            StartStream(uriBuilder.ToString());
        }