send message to clients, not RPC

I’m working on a multiplayer programs. And now I wanna send a “StartGame” message to all clients. But I use unity5.1, in which the RPC is deprecated. So, I don’t know how to send a message to the clients from the server.

hello,
use this: [ClientRpc]

http://docs.unity3d.com/Manual/UNet.html
5.1 has brought a shiny new networking system to Unity. The old RPC’s still work for now but it’s a good time to start looking at their new stuff.