OS:windows ce6.0

code:

 #region Serialize
        /// <summary>
        /// Serializes endpoint information into a <see cref="SocketAddress"/> instance.
        /// </summary>
        /// <returns>A <see cref="SocketAddress"/> instance containing the socket address for the endpoint.</returns>
        public override SocketAddress Serialize()
        {
//#if WinCE
            SocketAddress btsa = new SocketAddress(AddressFamily32.Bluetooth, 40);//40
//#else
//            SocketAddress btsa = new SocketAddress(AddressFamily32.Bluetooth, 30);
//#endif
            //copy address type
            btsa[0] = 32;

            //copy device id
            if (m_id != null)
            {
                byte[ deviceidbytes = m_id.ToByteArray();

                for (int idbyte = 0; idbyte < 6; idbyte++)
                {
//#if WinCE
                    btsa[idbyte + 8] = deviceidbytes[idbyte];
//#else
//                    btsa[idbyte + 2] = deviceidbytes[idbyte];
//#endif
                }
            }

            //copy service clsid
            if (m_service != Guid.Empty)
            {
                byte[ servicebytes = m_service.ToByteArray();
                for (int servicebyte = 0; servicebyte < 16; servicebyte++)
                {
//#if WinCE
                    btsa[servicebyte + 16] = servicebytes[servicebyte];
//#else
//                    btsa[servicebyte + 10] = servicebytes[servicebyte];
//#endif
                }
            }

            //copy port
            byte[ portbytes = BitConverter.GetBytes(m_port);
            for (int portbyte = 0; portbyte < 4; portbyte++)
            {
//#if WinCE
                btsa[portbyte + 32] = portbytes[portbyte];
//#else
//                btsa[portbyte + 26] = portbytes[portbyte];
//#endif
            }

            return btsa;
        }
        #endregion

               #region Create
        /// <summary>
        /// Creates an endpoint from a socket address.
        /// </summary>
        /// <param name="socketAddress">The <see cref="SocketAddress"/> to use for the endpoint.</param>
        /// <returns>An <see cref="EndPoint"/> instance using the specified socket address.</returns>
        public override EndPoint Create(SocketAddress socketAddress)
        {
            if (socketAddress == null)
            {
                throw new ArgumentNullException("socketAddress");
            }

            //if a Bluetooth SocketAddress
            if (socketAddress[0] == 32)
            {
                int ibyte;

                byte[ addrbytes = new byte;
                for (ibyte = 0; ibyte < 6; ibyte++)
                {
//#if WinCE
                    addrbytes[ibyte] = socketAddress[8 + ibyte];
//#else
//                    addrbytes[ibyte] = socketAddress[2 + ibyte];
//#endif
                }

                byte[ servicebytes = new byte[16];
                for (ibyte = 0; ibyte < 16; ibyte++)
                {
//#if WinCE
                    servicebytes[ibyte] = socketAddress[16 + ibyte];
//#else
//                    servicebytes[ibyte] = socketAddress[10 + ibyte];
//#endif
                }

                byte[ portbytes = new byte[4];
                for (ibyte = 0; ibyte < 4; ibyte++)
                {
//#if WinCE
                    portbytes[ibyte] = socketAddress[32 + ibyte];
//#else
//                    portbytes[ibyte] = socketAddress[26 + ibyte];
//#endif
                }

                return new BluetoothEndPoint(new BluetoothAddress(addrbytes), new Guid(servicebytes), BitConverter.ToInt32(portbytes, 0));

            }
            else
            {
                //use generic method
                return base.Create(socketAddress);
            }
        }
        #endregion

add watch:

+  btsa {32:40:{0,0,0,0,0,0,0,0,0,0,0,0,0,0,5,17,0,0,0,0,0,16,128,0,0,128,95,155,52,251,0,0,0,0,0,0,0,0}} System.Net.SocketAddress
    socketAddress = {32:40:{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,5,0,0,0,0,0,0,0}} 

BluetoothAddress will be 000000000000. Why???

Eeeeeh lots of source code there.

I dom't understand why you think there should be anything different.  It all looks consistent to me.  The address bytes are read from bytes 9 thru 14 (8-13 zero-indexed) which are all zeros....

Firstly if you are using the code independently of the compiled dll you'll need to add the WinCE compilation constant to your project to ensure the correct code paths are used - this is much easier than commenting out all the #ifs

Perhaps you can put this in context - what code are you calling to end up with this empty device address, I suspect that it has nothing to do with the serialization/de-serialization of the socketaddress...

Peter