New Post: distinguishing Track from Follow

var ids = new HashSet<long>( /* Put your follower ids here */ );

var fs = Stream.CreateFilteredStream();
ids.ForEach(id => fs.AddFollow(id));

fs.MatchingTweetReceived += (sender, args) =>
{
    var tweet = args.Tweet;
    var followerId = tweet.Creator.Id;

    if (ids.Contains(followerId))
    {
        // Follower posted this tweet
    }
};

fs.StartStreamMatchingAnyCondition();