how to draw ellipse in specific height, width and start point on the map?

[DeminHu]

I need to draw  a collection of ellipse with different width, height , but the same start point and angles on the map, then use the difference between 2 ellipses  to  do spatial query.

Any help willbe appreciated.

[JenniferNery]

Have you looked at this sample? http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#DrawGraphics Draw is meant to be interactive. You can scale the geometry using Editor.EditVertices or EditGeometry and set MaintainAspectRatio=True. http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#EditToolsGeometry.