ArcGIS Pro 2.6 API Reference Guide
Segment Class
Members 

ArcGIS.Core.Geometry Namespace : Segment Class
Abstract class representing a start and end point and how they are connected. The most common is a straight line LineSegment.
Object Model
Segment ClassCoordinate2D StructureMapPoint ClassSpatialReference ClassCoordinate2D StructureMapPoint Class
Syntax
public abstract class Segment 
Public MustInherit Class Segment 
Remarks
Segments are used as the building blocks of the parts of Polygon and Polyline classes.
Inheritance Hierarchy

System.Object
   ArcGIS.Core.Geometry.Segment
      ArcGIS.Core.Geometry.CubicBezierSegment
      ArcGIS.Core.Geometry.EllipticArcSegment
      ArcGIS.Core.Geometry.LineSegment

Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 7

See Also

Reference

Segment Members
ArcGIS.Core.Geometry Namespace