Linqpad driver is missing some of the event classes in the connection view:

In this case, all the 4 classes have Info and Associate events (some Enter/Exit). For some reason they only appear in the Device_Client class.
The query though works as expected and returns the same counts as PerfView:
playback.GetAll(
typeof(Tx.Windows.Microsoft_Azure_Devices_Provisioning_Client.Associate),
typeof(Tx.Windows.Microsoft_Azure_Devices_Provisioning_Client.Info),
typeof(Tx.Windows.Microsoft_Azure_Devices_Provisioning_Client.RegisterAsync)
).Count().Dump();