ArcGIS Pro 3.3 API Reference Guide
ArcGIS.Desktop.Mapping Namespace / SelectionSet Class / Contains Method
Version

Contains Method (SelectionSet)
Overload List
OverloadDescription
Determines if records from the specified mapMember are in the SelectionSet.  
Determines if the specified record specified by the mapMember and oid pair is in the SelectionSet.  
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also