I would like to know if it is possible to use C# sockets with the free unity as I don’t want to use the given networking system. I’d like to make my own server in C++, so, is it possible ?
Check out the licence comparison under “code” header: Powerful 2D, 3D, VR, and AR software for cross-platform development of games and mobile apps.
.NET socket support is available with the free base licence (Windows, Macintosh, Linux, Web Player) however it is only available with pro versions of the iOS and Android add-ons.
Hope that answers it.