ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Core.CIM Namespace / CIMLayoutDocument Class / MapDefinitions Property

MapDefinitions Property (CIMLayoutDocument)
Gets or sets the map definitions of the layout document.
Syntax
public CIMDefinition[] MapDefinitions {get; set;}
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.0 or higher.
See Also