How to split the client and the server ?

Hi guys,

I'm trying to split my game project into two executables : client/server (dedicated) and i wanted to know if someone has already done that ?

My problem is: i crate a game empty called "Network Manager" with this following script:

void Start() {
_networkManager.StartServer();
}

So, in my client, when i create a new client with a new NetworkManager (StartClient()), which side i need to play the game ? In my client ? But it's not really logic..! I guess it's server side but i...

How to split the client and the server ?