https://help.syncfusion.com/cr/aspnetcore-js2/Syncfusion.EJ2.Charts.SmithchartSeriesMarkerDataLabel.html
Class SmithchartSeriesMarkerDataLabel - ASP.NETCore-EJ2 API Reference | Syncfusion
Class SmithchartSeriesMarkerDataLabel - ASP.NETCore-EJ2 API Reference
api referenceclassaspnetcoresyncfusion