ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Core.Geometry Namespace / LineSegment Class
Members Example Version

LineSegment Class
A class representing a straight line between a start and end point for use in a Multipart geometry. To create a line segment use the LineBuilderEx object.
Object Model
LineSegment ClassCoordinate2D StructureMapPoint ClassEnvelope ClassSpatialReference ClassCoordinate2D StructureMapPoint Class
Syntax
public sealed class LineSegment : Segment 
Remarks

Line Segment

Example
StartPoint of a Polyline
// Method 1: Get the start point of the polyline by converting the polyline 
//    into a collection of points and getting the first point

// sketchGeometry is a Polyline
// get the sketch as a point collection
var pointCol = ((Multipart)sketchGeometry).Points;
// Get the start point of the line
var firstPoint = pointCol[0];

// Method 2: Convert polyline into a collection of line segments 
//   and get the "StartPoint" of the first line segment.
var polylineGeom = sketchGeometry as ArcGIS.Core.Geometry.Polyline;
var polyLineParts = polylineGeom.Parts;

ReadOnlySegmentCollection polylineSegments = polyLineParts.First();

//get the first segment as a LineSegment
var firsLineSegment = polylineSegments.First() as LineSegment;

//Now get the start Point
var startPoint = firsLineSegment.StartPoint;
Inheritance Hierarchy

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

Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also