ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Core.Events Namespace / AsyncPresentationEvent<TPayload> Class / ContainsAny Method
Version

ContainsAny Method (AsyncPresentationEvent<TPayload>)
Returns true if there are currently any subscribers.
Syntax
protected internal bool ContainsAny()

Return Value

true if there are currently any listeners subscribed on this event; otherwise false.
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also