ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Desktop.Core Namespace / IProjectWindow Interface / SelectionCount Property

SelectionCount Property (IProjectWindow)
The number of selected Items
Syntax
int SelectionCount {get;}
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.1 or higher.
See Also