public static void UpdateSolid3D(ObjectId objectId, dynamic xb)
{
Editor ed = acApp.DocumentManager.MdiActiveDocument.Editor;
Document acDoc = acApp.DocumentManager.MdiActiveDocument;
Database acCurDb = acDoc.Database;
Point3d p1 = new Point3d(Convert.ToDouble(xb.x1), Convert.ToDouble(xb.y1), Convert.ToDouble(xb.z1));
Point3d p2 = new Point3d(Convert.ToDouble(xb.x2), Convert.ToDouble(xb.y2), Convert.ToDouble(xb.z2));
//acCurDb.TryGetObjectId();
// Start a transaction
using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction())
{
Solid3d acSol3DBox = (Solid3d)acTrans.GetObject(objectId, OpenMode.ForWrite);
acSol3DBox.CreateBox(Math.Abs(p2.X - p1.X), Math.Abs(p2.Y - p1.Y), Math.Abs(p2.Z - p1.Z));
Point3d center = new Point3d(p1.X + ((p2.X - p1.X) / 2), p1.Y + ((p2.Y - p1.Y) / 2), p1.Z + ((p2.Z - p1.Z) / 2));
acSol3DBox.TransformBy(Matrix3d.Displacement(center.GetAsVector()));
acSol3DBox.Draw();
acTrans.Commit();
ed.UpdateScreen();
}
}