ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Desktop.Framework Namespace / NotificationItem Class / Action Property

Action Property (NotificationItem)
Gets a custom handler specified to control what happens when a notification is clicked.
Syntax
public Delegate Action {get;}
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.1 or higher.
See Also