Universal.Torrent.Client.PeerConnections.PeerId.CloseConnection C# (CSharp) Method

        public void CloseConnection()
        {
            ClientEngine.MainLoop.QueueWait(delegate { Connection?.Dispose(); });
        }

        internal static IAsyncResult BeginCheckEncryption(PeerId id, int bytesToReceive, AsyncCallback callback,
            object state, InfoHash[] sKeys)
        {
            var result = new EncryptorAsyncResult(id, callback, state) {SKeys = sKeys};

            var c = id.Connection;
            ClientEngine.MainLoop.QueueTimeout(TimeSpan.FromSeconds(10), delegate
            {
                if (id.Encryptor == null || id.Decryptor == null)
                    id.CloseConnection();
                return false;
            });

            try
            {
                // If the connection is incoming, receive the handshake before
                // trying to decide what encryption to use
                if (id.Connection.IsIncoming)
                {
                    result.Buffer = new byte[bytesToReceive];
                    NetworkIO.EnqueueReceive(c, result.Buffer, 0, result.Buffer.Length, null, null, null,
                        HandshakeReceivedCallback, result);
                }
                else
                {
                    var usable = CheckRc4(id);
                    var hasPlainText = Toolbox.HasEncryption(usable, EncryptionTypes.PlainText);
                    var hasRc4 = Toolbox.HasEncryption(usable, EncryptionTypes.RC4Full) ||
                                 Toolbox.HasEncryption(usable, EncryptionTypes.RC4Header);
                    if (id.Engine.Settings.PreferEncryption)
                    {
                        if (hasRc4)
                        {
                            result.EncSocket = new PeerAEncryption(id.TorrentManager.InfoHash, usable);
                            result.EncSocket.BeginHandshake(id.Connection, CompletedEncryptedHandshakeCallback, result);
                        }
                        result.Complete();
                    }
                    else
                    {
                        if (hasPlainText)
                        {
                            result.Complete();
                        }
                        else
                        {
                            result.EncSocket = new PeerAEncryption(id.TorrentManager.InfoHash, usable);
                            result.EncSocket.BeginHandshake(id.Connection, CompletedEncryptedHandshakeCallback, result);
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                result.Complete(ex);
            }
            return result;
        }