ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Core.Events Namespace / RegisteredPresentationEvent<TSubscriptionParam,TPayload> Class / OnSubscribe Method
The parameter passed to the Register method
The subscription token that is assigned to the subscriber
Version

OnSubscribe Method
Callback made on the event instance when a subscriber subscribes to the event
Syntax
protected virtual void OnSubscribe( 
   TSubscriptionParam param,
   SubscriptionToken token
)

Parameters

param
The parameter passed to the Register method
token
The subscription token that is assigned to the subscriber
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also