BuildingCoder.CmdSelectionChanged.PanelEvent C# (CSharp) Метод

        void PanelEvent(
            object sender,
            System.ComponentModel.PropertyChangedEventArgs e)
        {
            Debug.Assert( sender is Autodesk.Windows.RibbonTab,
            "expected sender to be a ribbon tab" );

              if( e.PropertyName == "Title" )
              {
            ICollection<ElementId> ids = _uiapp
              .ActiveUIDocument.Selection.GetElementIds();

            int n = ids.Count;

            string s = ( 0 == n )
              ? "<nil>"
              : string.Join( ", ",
            ids.Select<ElementId, string>(
              id => id.IntegerValue.ToString() ) );

            Debug.Print(
              "CmdSelectionChanged: selection changed: "
              + s );
              }
        }