SignalR新手系列教程详解总结
GlobalHost.ConnectionManager.GetHubContext<TodoListHub>() .Clients.Clients(listConnectionId).ReceiveTodoCount(new { APPID = appID, Num = num });
https://www.zhidao91.com/signalr-tutorials/
https://docs.microsoft.com/zh-cn/aspnet/signalr/overview/getting-started/tutorial-getting-started-with-signalr-and-mvc