ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Core.Data Namespace / JoinDescription Class / Selection Property

Selection Property (JoinDescription)
Gets or sets the Selection to be used in creating the join.
Syntax
public Selection Selection {get; set;}
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.0 or higher.
See Also