ArcGIS Pro 2.7 API Reference Guide
ID Property (PopupContent)

ArcGIS.Desktop.Mapping Namespace > PopupContent Class : ID Property
Gets or sets the object id associated with the pop-up. Can be -1 if the pop-up is not tied to a specific object id.
Syntax
public long ID {get; set;}
Public Property ID As Long
Requirements

Target Platforms: Windows 10, Windows 8.1

See Also

Reference

PopupContent Class
PopupContent Members