ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Core.Geometry Namespace / Multipoint Class / PointCount Property

PointCount Property (Multipoint)
Gets the count of points in this instance.
Syntax
public override int PointCount {get;}
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.0 or higher.
See Also