How can I send List< string[] > using NetworkComms.Net

Question

There is a server and a client. I am trying to send a list of string arrays (List< string[] >) from the server to the client. I want to learn how to correctly serialise such an object. So far I have the following:

Server side:

 NetworkComms.SendObject("test", clientIP, clientPort, testData.AsParallel().ToList());

Client Side:

NetworkComms.AppendGlobalIncomingPacketHandler<List<string[]>>("test", DoSomething);

DoSomething function:

private static void DoSomething (PacketHeader header, Connection connection, List<string[]> testData)
    //do stuff
}

I get the following error when I do this:

objectToSerialize must implement IExplicitlySerialize

Parameter name: objectToSerialize