无法使用单种子从新创建的种子下载文件

我使用以下代码在单洪流解决方案中创建种子。但是缺少"RawTrackerTier"的引用。当我评论该行代码时，我可以创建种子，但我无法从创建的种子下载文件。是因为解决方案中缺少引用还是任何其他问题？如果是，任何人都可以提供缺少的参考资料吗？请帮帮我！！

public void CreateTorrent(string path, string savePath)
{
    // The class used for creating the torrent
    TorrentCreator c = new TorrentCreator();
    // Add one tier which contains two trackers
    RawTrackerTier tier = new RawTrackerTier(); // MISSING REFERENCE HERE
    tier.Add("http://localhost/announce");
    c.Announces.Add(tier);
    c.Comment = "This is the comment";
    c.CreatedBy = "Doug using " + VersionInfo.ClientVersion;
    c.Publisher = "www.aaronsen.com";
    // Set the torrent as private so it will not use DHT or peer exchange
    // Generally you will not want to set this.
    c.Private = true;
    // Every time a piece has been hashed, this event will fire. It is an
    // asynchronous event, so you have to handle threading yourself.
    c.Hashed += delegate(object o, TorrentCreatorEventArgs e)
    {
        Console.WriteLine("Current File is {0}% hashed", e.FileCompletion);
        Console.WriteLine("Overall {0}% hashed", e.OverallCompletion);
        Console.WriteLine("Total data to hash: {0}", e.OverallSize);
    };
    // ITorrentFileSource can be implemented to provide the TorrentCreator
    // with a list of files which will be added to the torrent metadata.
    // The default implementation takes a path to a single file or a path
    // to a directory. If the path is a directory, all files will be
    // recursively added
    ITorrentFileSource fileSource = new TorrentFileSource(path);
    // Create the torrent file and save it directly to the specified path
    // Different overloads of 'Create' can be used to save the data to a Stream
    // or just return it as a BEncodedDictionary (its native format) so it can be
    // processed in memory
    c.Create(fileSource, savePath);
}

// The class used for creating the torrent
TorrentCreator c = new TorrentCreator();
// Add tracker(s)
c.Announces.Add("http://localhost/announce");