C# torrent client embed problem

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C#

Hello.
I need to embed torrent client (ability to download files by .torrent file) inside of my C# application. I am using monotorrent library to do that.
I need to write windows app that can download files to my local folder by .torrent file.

I have downloaded assembly for C# project from here http://www.monotorrent.com/projects/list_files/monotorrent

Here is code i am using :

using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Data;
 using System.Drawing;
 using System.Linq;
 using System.Text;
 using System.Windows.Forms;

 using MonoTorrent.Client;
 using MonoTorrent.Client.Encryption;
 using System.IO;
 using MonoTorrent.Common;
 using System.Net;


 namespace monotorrent
 {
 public partial class Form1 : Form
 {
     ClientEngine engine;
     public Form1()
     {
         InitializeComponent();
     }

     private void button1_Click(object sender, EventArgs e)
     {
         Torrent torrent = Torrent.Load("C:\\1.torrent");

         // Create the manager which will download the torrent to savePath
         // using the default settings.
         TorrentManager manager = new TorrentManager(torrent, "E:\\torrent", new TorrentSettings());

         // Register the manager with the engine
         this.engine.Register(manager);

         // Begin the download. It is not necessary to call HashCheck on the manager
         // before starting the download. If a hash check has not been performed, the
         // manager will enter the Hashing state and perform a hash check before it
         // begins downloading.

         // If the torrent is fully downloaded already, calling 'Start' will place
         // the manager in the Seeding state.
         manager.Start();
     }
 }
 }

When i run the code and press download button i have got an error :

Cannot load type "MonoTorrent.Common.Torrent" from assembly "monotorrent, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null".

I think this is a problem with assembly . But where can i get a normal assembly(.dll) ?

Please help me to resolve this issue.

P.S. if you know more simple solution to embed torrent client to windows form app - You are wellcome =)