C# NX创建圆

 public static int Main(string[] args)    {        int retValue = 0;        try        {            theProgram = new Program();            //TODO: Add your application code here             NXOpen.Part workPart = theSession.Parts.Work;           /* NXOpen.Point3d centerPoint3D = new Point3d(0,0,0);            NXOpen.Point3d xDirection = new Point3d(50, 100, 50);            NXOpen.Point3d yDirection = new Point3d(100, 100, 100);            bool startAndEndGotFlipped;            NXOpen.Arc line = workPart.Curves.CreateArc(centerPoint3D, pointon, endpoint, true, out startAndEndGotFlipped);*/            NXOpen.Point3d center = new NXOpen.Point3d(0, 0, 0);            NXOpen.Vector3d xvec = new NXOpen.Vector3d(0, 1, 0);            NXOpen.Vector3d yvec = new NXOpen.Vector3d(0, 1, 0);            NXOpen.Arc arc =  workPart.Curves.CreateArc(center, xvec, yvec, 5, 0, 2*System.Math.PI);            arc.Color = 120;            theProgram.Dispose();        }        catch (NXOpen.NXException ex)        {            // ---- Enter your exception handling code here -----        }        return retValue;    }