ArcGIS Pro 2.7 API Reference Guide
CIMLayerDocument Class
Members 

ArcGIS.Core.CIM Namespace : CIMLayerDocument Class
Represents a layer document which is the document type used for saving .lyrx files.
Object Model
CIMLayerDocument ClassCIMBinaryReference ClassCIMMapElevationSurface ClassCIMLayerDocument ClassCIMLayerDocument ClassCIMDefinition ClassCIMDefinition ClassCIMValidationRule Class
Syntax
Inheritance Hierarchy

System.Object
   ArcGIS.Core.CIM.CIMObject
      ArcGIS.Core.CIM.CIMVersion
         ArcGIS.Core.CIM.CIMLayerDocument

Requirements

Target Platforms: Windows 10, Windows 8.1

See Also

Reference

CIMLayerDocument Members
ArcGIS.Core.CIM Namespace