ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Core.Geometry Namespace / EllipticArcBuilderEx Class / StartPoint Property
Example Version

StartPoint Property (EllipticArcBuilderEx)
Gets or sets the start point.
Syntax
public override MapPoint StartPoint {get; set;}
Exceptions
ExceptionDescription
The point is null or empty.
The point is not on the embedded circle or ellipse.
Remarks
When setting the start point, it must lie on the embedded circle or ellipse. The start angle, central angle, and end angle may change. All other properties are unchanged.
Example
Elliptic Arc Builder Properties
// retrieve the curve's properties
EllipticArcBuilderEx builder = new EllipticArcBuilderEx(arcSegment);
MapPoint startPt = builder.StartPoint;
MapPoint endPt = builder.EndPoint;
Coordinate2D centerPt = builder.CenterPoint;
bool isCircular = builder.IsCircular;
bool isMinor = builder.IsMinor;
double startAngle = builder.StartAngle;
double endAngle = builder.EndAngle;
double centralAngle = builder.CentralAngle;
double rotationAngle = builder.RotationAngle;
ArcOrientation orientation = builder.Orientation;
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also