UserManager.getConnectedUserNames C# (CSharp) Method

    public List<string> getConnectedUserNames()
    {
        lock (lockConnectedObject)
        {
            if (_clientsConnectedUserNameStatusUpdate)
            {
                _clientsConnectedUserNameCached = new List<string>();
                foreach (ClientInfo client in ConnectedClients.Values)
                {
                    _clientsConnectedUserNameCached.Add(client.UserName);
                }
                _clientsConnectedUserNameStatusUpdate = false;
            }

            return _clientsConnectedUserNameCached;
        }
    }