ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Core.Geometry Namespace / Polygon Class / IsExteriorRing Method
Version

IsExteriorRing Method
Overload List
OverloadDescription
Determines if the specified part of this polygon is an exterior ring.  
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also