public void SendMessage(Message message) { foreach (var user in _registeredUsers) { if (user.Equals(message.Receiver)) { try { _storageHandler.AddChatContact(message.Receiver, message.Sender); _storageHandler.AddMessageToHistory(message.Sender, message.Receiver, message); _storageHandler.AddMessageToHistory(message.Receiver, message.Sender, message); } catch (Exception) { } } } var onlineUser = _onlineUsersList.FirstOrDefault(u => u.Id == message.Receiver.Id); if (onlineUser != null) { onlineUser.OperationContext.GetCallbackChannel <IChatServerCallback>().MessageCallback(message); } }