ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Core.Events Namespace / RegisteredPresentationEvent<TSubscriptionParam,TPayload> Class / Contains Method / Contains(Func<TPayload,Task>) Method
The Action used when subscribing to the event.
Version

Contains(Func<TPayload,Task>) Method
Returns true if there is a subscriber matching .
Syntax
protected internal bool Contains( 
   Func<TPayload,Task> subscriber
)

Parameters

subscriber
The Action used when subscribing to the event.

Return Value

true if there is an that matches; otherwise false.
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also