ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Desktop.Core Namespace / Item Class / SortOrder Property

SortOrder Property (Item)
Gets and sets the project item sort order for the item.
Syntax
protected internal ProjectItemSortOrder SortOrder {get; set;}
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.0 or higher.
See Also