ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Core.Geometry Namespace / Polygon Class / IsEqual Method / IsEqual(Polygon) Method
A Polygon to test for equality.
Version

IsEqual(Polygon) Method
Compares two Polygon for equality. This will check that the SpatialReference, attribute awareness (HasZ, HasM, HasID), and the content of Multipart.Parts match. The order of parts must match too.
Syntax
public bool IsEqual( 
   Polygon polygon
)

Parameters

polygon
A Polygon to test for equality.

Return Value

Value to indicate if the two geometries are equal.
Remarks
To compare two geometries regardless of their point order you can use the Equals(Geometry,Geometry) method. GeometryEngine.Equals is a little more costly to compute.
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also