ArcGIS Pro 2.7 API Reference Guide
ToSegment() Method
Example 

ArcGIS.Core.Geometry Namespace > LineBuilder Class : ToSegment() Method
Returns a LineSegment instance representing the current state of the builder. This method must be called on the MCT. Use QueuedTask.Run.
Syntax
public LineSegment ToSegment()
Public Function ToSegment() As LineSegment

Return Value

Exceptions
ExceptionDescription
This method or property must be called within the lambda passed to QueuedTask.Run.
Example
// Use a builder convenience method or use a builder constructor.

MapPoint startPt = MapPointBuilder.CreateMapPoint(1.0, 1.0);
MapPoint endPt = MapPointBuilder.CreateMapPoint(2.0, 1.0);

// Builder convenience methods don't need to run on the MCT.
LineSegment lineFromMapPoint = LineBuilder.CreateLineSegment(startPt, endPt);

// coordinate2D
Coordinate2D start2d = (Coordinate2D)startPt;
Coordinate2D end2d = (Coordinate2D)endPt;

LineSegment lineFromCoordinate2D = LineBuilder.CreateLineSegment(start2d, end2d);

// coordinate3D
Coordinate3D start3d = (Coordinate3D)startPt;
Coordinate3D end3d = (Coordinate3D)endPt;

LineSegment lineFromCoordinate3D = LineBuilder.CreateLineSegment(start3d, end3d);

// lineSegment
LineSegment anotherLineFromLineSegment = LineBuilder.CreateLineSegment(lineFromCoordinate3D);

// Builder constructors need to run on the MCT.
ArcGIS.Desktop.Framework.Threading.Tasks.QueuedTask.Run(() =>
{
  using (LineBuilder lb = new LineBuilder(startPt, endPt))
  {
    // do something with the builder

    lineFromMapPoint = lb.ToSegment();
  }

  using (LineBuilder lb = new LineBuilder(start2d, end2d))
  {
    // do something with the builder

    lineFromCoordinate2D = lb.ToSegment();
  }

  using (LineBuilder lb = new LineBuilder(start3d, end3d))
  {
    // do something with the builder

    lineFromCoordinate3D = lb.ToSegment();
  }

  using (LineBuilder lb = new LineBuilder(lineFromCoordinate3D))
  {
    // do something with the builder

    LineSegment lineFromLineSegment = lb.ToSegment();
  }
});
Requirements

Target Platforms: Windows 10, Windows 8.1

See Also

Reference

LineBuilder Class
LineBuilder Members