问题
i want to create a server that send notifications to client using SignalR - using groups suppose that my site was recycled - what will happen to the groups as they are not persist
回答1:
You would need to persist your groups in external permanent storage. Look for more details here: http://www.asp.net/signalr/overview/hubs-api/working-with-groups
来源：https://stackoverflow.com/questions/18111304/signalr-and-iis-recycle