Draw a oval around a polyline

[EricJing]

I am wondering how to draw a oval around a polyline as below...

The blue one is the polyline stored in mmpk, I need to draw a oval around it on a GraphicOverlay....

Can someone please help? Thanks...

[dotMorten_esri · Accepted solution]

Take a look at the buffer method:
GeometryEngine.Buffer Method (Geometry, Double) 

[EricJing]

Great....Thanks....So quick reply...