Add function to generate Bezier line to Esri.ArcGISRuntime.Geometry.GeometryEngine

Idea created by shohei_kusanoesrij-esridist Employee on Oct 3, 2018

    Currently ArcGIS Runtime SDK for .NET 100.x does not have Bezier line generation function. In order to generate Bezier line, I need to call geoprocessing service which requires ArcGIS Enterprise. It would be great if Runtime SDK geometry engine can generate Bezier line locally.