How To Invoke RPC On Selected Multiple Clients

// rpcID = 1 means that you will invoke RPC method associated with 1
int rpcID = 1;
// List of selected remote client IDs to execute RPC on
List<string> clientIDs = new List<string>();
// For UDP client reliable = true means RUDP transmission
bool reliable = true;
bool called = rpc.RPCAll(rpcID, clientIDs, Encoding.UTF8.GetBytes("Hello World"), reliable);