ArcGIS Pro 2.8 API Reference Guide
CIMMultiLayerSymbol Class
Members 

ArcGIS.Core.CIM Namespace : CIMMultiLayerSymbol Class
Represents a multilayer symbol, a generic type for point, line, and polygon symbols, specifying that they can contain more than one symbol layers.
Syntax
Inheritance Hierarchy

System.Object
   ArcGIS.Core.CIM.CIMObject
      ArcGIS.Core.CIM.CIMSymbol
         ArcGIS.Core.CIM.CIMMultiLayerSymbol
            ArcGIS.Core.CIM.CIMLineSymbol
            ArcGIS.Core.CIM.CIMMeshSymbol
            ArcGIS.Core.CIM.CIMPointSymbol
            ArcGIS.Core.CIM.CIMPolygonSymbol

Requirements

Target Platforms: Windows 10, Windows 8.1

See Also

Reference

CIMMultiLayerSymbol Members
ArcGIS.Core.CIM Namespace