public void HandleClientAvailabilityRequest(C2SMessageReader mr)
 {
     if (!ServerCommunicationCenter.commCenter.ClientsEndPoint.ContainsKey(mr.ClientEP()))
     {
         return;
     }
     if (ServerCommunicationCenter.commCenter.ClientsEndPoint.ContainsKey(mr.ReadRequestedClientId()))
     {
         ServerMessageProvider smp = new ServerMessageProvider(SocketResourcesManager.srm.ProvideBuffer());
         OutputMessage         om  = smp.ProvideClientAvailableMessage(mr.ReadRequestedClientId());
         ServerCommunicationCenter.commCenter.SendMessageTo(mr.ClientEP(), om);
     }
 }