Delegate problems :S

public void HashTorrent(TorrentManager manager)
       {
           // Note: The manager must be in the 'Stopped' state in order to perform
           // a hash check. Also, to make the sample easier the event handler
            // is not unregistered. In your application be careful you don't
          // accidentally attach a new event handler every time the torrent is hashed
          manager.PieceHashed += delegate (object o, PieceHashedEventArgs e);
               int pieceIndex = e.PieceIndex;
               int totalPieces = e.TorrentManager.Torrent.Pieces.Count;
              double progress = (double) pieceIndex / totalPieces * 100.0;
             if (e.HashPassed)
                  Console.WriteLine("Piece {0} of {1} is complete", pieceIndex, totalPieces);
               else
                   Console.WriteLine("Piece {0} of {1} is corrupt or incomplete ", pieceIndex, totalPieces);

               // This shows how complete the hashing is.
               Console.WriteLine("Total progress is: {0}%", progress);

              // This shows the percentage completion of the download. This value
              // is updated as the torrent is hashed or new pieces are downloaded
               Console.WriteLine("{0}% of the torrent is complete");
          };

           // If 'true' is passed, the torrent will automatically go to the 'Downloading' or 'Seeding'
           // state once the hash check is finished. Otherwise it will return to the 'Stopped' state.
            manager.HashCheck(false);
    }

manager.PieceHashed += delegate (object o, PieceHashedEventArgs e);