static void Main(string[] args)
{
Receiver rec = new Receiver(); // cria um objecto para receber callbacks
DuplexServiceClient svc = new DuplexServiceClient(new InstanceContext(rec));
Console.WriteLine(svc.init());
for (; ; )
{
Console.Write("msg to send?");
string msg = Console.ReadLine();
if (string.Compare(msg, "exit") == 0) break;
svc.SendMsg(msg);
}
svc.exit();
}