BuildingCoder.CmdCollectorPerformance.findConcreteRamps C# (CSharp) Метод

        IEnumerable<Element> findConcreteRamps( Document doc )
        {
            return new FilteredElementCollector( doc )
            .WhereElementIsNotElementType()
            .OfCategory( BuiltInCategory.OST_Ramps )
            //.Where( e => e.Category.Id.IntegerValue.Equals(
            //  (int) BuiltInCategory.OST_Ramps ) )
            .Where( e =>
            {
              ElementId id = e.GetValidTypes().First(
            id2 => id2.Equals( e.GetTypeId() ) );

              Material m = doc.GetElement( doc.GetElement( id )
            .get_Parameter(
              BuiltInParameter.RAMP_ATTR_MATERIAL )
            .AsElementId() ) as Material;

              return m.Name.Contains( "Concrete" );
            } );
        }