ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Desktop.Mapping Namespace / PopupDefinition Class / Append Property
Version

Append Property
Gets or sets whether content already in the dockable window is kept or cleared. Only used when dockable is true.
Syntax
public bool Append {get; set;}
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also