ArcGIS Pro 2.8 API Reference Guide
CreateBezierCurveGraphicElement Method (IElementFactory)
Example 

ArcGIS.Desktop.Layouts Namespace > IElementFactory Interface : CreateBezierCurveGraphicElement Method
Layout or GroupElement
Polyline
CIMLineSymbol
Creates a graphic bezier curve element on a layout from a single polyline geometry. This method must be called on the MCT. Use QueuedTask.Run.
Syntax
Function CreateBezierCurveGraphicElement( _
   ByVal elementContainer As ILayoutElementContainer, _
   ByVal polyline As Polyline, _
   Optional ByVal lineSymbol As CIMLineSymbol _
) As GraphicElement

Parameters

elementContainer
Layout or GroupElement
polyline
Polyline
lineSymbol
CIMLineSymbol

Return Value

Returns a GraphicElement.
Exceptions
ExceptionDescription
This method or property must be called within the lambda passed to QueuedTask.Run.
Remarks
If the element container is a Layout then the element gets added to the root level of the layout TOC at the top most position. If the element container is a GroupElement then it gets added to the group at the topmost position.
Example
//Create a beizier curve element with a simple line style.

//Construct on the worker thread
await QueuedTask.Run(() =>
{
  //Build geometry
  Coordinate2D pt1 = new Coordinate2D(1, 7.5);
  Coordinate2D pt2 = new Coordinate2D(1.66, 8);
  Coordinate2D pt3 = new Coordinate2D(2.33, 7.1);
  Coordinate2D pt4 = new Coordinate2D(3, 7.5);
  CubicBezierBuilder bez = new CubicBezierBuilder(pt1, pt2, pt3, pt4);
  CubicBezierSegment bezSeg = bez.ToSegment();
  Polyline bezPl = PolylineBuilder.CreatePolyline(bezSeg);

  //Set symbology, create and add element to layout
  CIMLineSymbol lineSym = SymbolFactory.Instance.ConstructLineSymbol(ColorFactory.Instance.RedRGB, 4.0, SimpleLineStyle.DashDot);
  GraphicElement bezElm = LayoutElementFactory.Instance.CreateLineGraphicElement(layout, bezPl, lineSym);
  bezElm.SetName("New Bezier Curve");
});
Requirements

Target Platforms: Windows 10, Windows 8.1

See Also

Reference

IElementFactory Interface
IElementFactory Members