BuildingCoder.CmdDeleteUnusedRefPlanes.DeleteIfNotHosting C# (CSharp) Метод

        bool DeleteIfNotHosting( ReferencePlane rp )
        {
            bool rc = false;

              Document doc = rp.Document;

              using( Transaction tx = new Transaction( doc ) )
              {
            tx.Start( "Delete ReferencePlane "
              + ( ++_i ).ToString() );

            // Deletion simply fails if the reference
            // plane hosts anything. If so, the return
            // value ids collection is null.
            // In Revit 2014, in that case, the call
            // throws an exception "ArgumentException:
            // ElementId cannot be deleted."

            try
            {
              ICollection<ElementId> ids = doc.Delete(
            rp.Id );

              tx.Commit();
              rc = true;
            }
            catch( ArgumentException )
            {
              tx.RollBack();
            }
              }
              return rc;
        }