public void unregisterClient(RelaySocket c)
 {
     clients.Remove(c);
 }
 public void registerClient(RelaySocket c)
 {
     clients.Add(c);
 }
 public void registerClient(RelaySocket c)
 {
     clients.Add(c);
 }
 public void unregisterClient(RelaySocket c)
 {
     clients.Remove(c);
 }