TEKLA API - CREATE PART "Ring type"

Code to create a part like a ring, will be inserted in center of the model as a pipe profile.     

Codigo para inserir peca tipo anel, sera inserido no centro do modelo com um perfil tipo Tubo.

//CREATE RING BEAM
        #region
        private void create_RingBeam()
        {
            double diametro = Convert.ToDouble(txtDiameter.Text);
            double altura = Convert.ToDouble(txtHeigth.Text);
            double raio = diametro / 2.0;
            double SlabOut = Convert.ToDouble(txtSlabSizeOutOfWall.Text);

            TSG.Point point1 = new TSG.Point(0, 0, 0);
            TSG.Point point2 = new TSG.Point(0, 0, 300);
            Beam ringbeam = new Beam();
            ringbeam.StartPoint = point1;
            ringbeam.EndPoint = point2;
            ringbeam.Profile.ProfileString = "PD" + (diametro + 1000) + "*" + "300";
            ringbeam.Name = "RING BEAM";
            ringbeam.Finish = "PAINT";
            ringbeam.Class = "2";
            //ringbeam.Position. = "raio";
            ringbeam.Position.Rotation = TSM.Position.RotationEnum.BACK;
            ringbeam.Position.Plane = TSM.Position.PlaneEnum.MIDDLE;
            ringbeam.Position.Depth = TSM.Position.DepthEnum.MIDDLE;
            ringbeam.StartPointOffset = new Offset();
            ringbeam.EndPointOffset = new Offset();
            bool result = false;
            result = ringbeam.Insert();
        }

        #endregion