Ok, so if I’m right it is not possible to send a DataTable like this, I need to serialize it first.

Here is some info if I’m right:
http://stackoverflow.com/questions/16314958/pass-data-table-from-server-to-client-using-tcp-c-sharp

http://stackoverflow.com/questions/2244655/how-to-serialize-a-datatable-to-a-string