ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Desktop.Framework.Contracts Namespace / IGalleryItem Interface / Thumbnail Property
Version

Thumbnail Property (IGalleryItem)
Gets or sets the gallery item's icon in the gallery customization dialog.
Syntax
ImageSource Thumbnail {get; set;}
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also