ArcGIS Pro 2.6 API Reference Guide
Append Property

ArcGIS.Desktop.Mapping Namespace > PopupDefinition Class : 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;}
Public Property Append As Boolean
Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 7

See Also

Reference

PopupDefinition Class
PopupDefinition Members