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I am trying to create a bounding box for any given ploygon using Revit API. Can someone help?

namespace Revit_SquarePlacement.Command
{
    [Transaction(TransactionMode.Manual)]
    class cmd_Training : IExternalCommand
    {
        public Result Execute(ExternalCommandData commandData, ref string message, Autodesk.Revit.DB.ElementSet elements)
        {
            try
            {
                UIApplication UIAPP = commandData.Application;
                UIDocument UIDoc = UIAPP.ActiveUIDocument;
                Autodesk.Revit.DB.Document ActiveDoc = UIDoc.Document;

                //Creating Bounding Box

                Reference oRef = UIDoc.Selection.PickObject(Autodesk.Revit.UI.Selection.ObjectType.Element);
                Element oLineEle = ActiveDoc.GetElement(oRef.ElementId);
                Line oLine = oLineEle as Wall;

                if (oWall != null)
                {
                    LocationCurve WallocCurve = oWall.Location as LocationCurve;
                    Line oLine = WallocCurve.Curve as Line;

                    XYZ LineStartPoint = oLine.GetEndPoint(0);
                    XYZ LineEndPoint = oLine.GetEndPoint(1);
                }

I tried finding the start and end point of a line and using that I tried getting min and max value of the line in order to get a bounding box. How should I move forward?

Hunter
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