請教關於c# PacketBase

我有個c# socket client program ，有呢兩句
byte[] data = getdata(); <--呢句既function會return byte[] got from socket
PacketBase msg = NetSerilizer.DeSerialize<PacketBase>(data); <--呢句出唔到msg (結果=null)
問題係我個socket server program係java，請問點可以砌到PacketBase format既byte array？