Mine

// Error /home/alan/Desktop/programming/bitsharp/src/MonoTorrent/Client/PeerMessages/FastPeerExtensions/SuggestPieceMessage.cs(141,34): error CS0539: `MonoTorrent.Client.PeerMessages.IPeerMessageInternal.Encode' in explicit interface declaration is not a member of interface

------------------------------------------------------------------------

// Interface

        int Encode(ArraySegment<byte> buffer, int offset);

        void Decode(ArraySegment<byte> buffer, int offset, int length);

------------------------------------------------------------------------

// Implementation
internal int Encode(ArraySegment<byte> buffer, int offset)
        {
            if (!ClientEngine.SupportsFastPeer)
                throw new ProtocolException("Message decoding not supported");

            buffer.Array[buffer.Offset + offset + 4] = MessageId;
            Buffer.BlockCopy(BitConverter.GetBytes(IPAddress.HostToNetworkOrder(messageLength)), 0, buffer.Array, buffer.Offset + offset, 4);
            Buffer.BlockCopy(BitConverter.GetBytes(IPAddress.HostToNetworkOrder(this.pieceIndex)), 0, buffer.Array, buffer.Offset + offset + 5, 4);
            return this.messageLength + 4;
        }


        internal void Decode(ArraySegment<byte> buffer, int offset, int length)
        {
            if (!ClientEngine.SupportsFastPeer)
                throw new ProtocolException("Message decoding not supported");

            this.pieceIndex = IPAddress.NetworkToHostOrder(BitConverter.ToInt32(buffer.Array, buffer.Offset + offset));
        }