internal IPolyline GetGeoPolylineFromPoints(IPoint startPoint, IPoint endPoint) { var construct = new Polyline() as IConstructGeodetic; if (construct == null) return null; construct.ConstructGeodeticLineFromPoints(GetEsriGeodeticType(), startPoint, endPoint, GetLinearUnit(), esriCurveDensifyMethod.esriCurveDensifyByDeviation, -1.0); return construct as IPolyline; }