ArcGIS Pro 2.8 API Reference Guide
NetworkDiagram Class
Members 

ArcGIS.Core.Data.UtilityNetwork.NetworkDiagrams Namespace : NetworkDiagram Class
Represents a network diagram.
Object Model
NetworkDiagram ClassDiagramManager ClassDiagramTemplate ClassNetworkDiagramInfo ClassDiagramElementQueryResult Class
Syntax
public sealed class NetworkDiagram : ArcGIS.Core.CoreObjectsBase, System.IDisposable  
Public NotInheritable Class NetworkDiagram 
   Inherits ArcGIS.Core.CoreObjectsBase
   Implements System.IDisposable 
Remarks
New network diagrams can be created using the DiagramManager.CreateNetworkDiagram factory method. Existing network diagrams can be retrieved from the DiagramManager or DiagramTemplate classes.
Inheritance Hierarchy

System.Object
   ArcGIS.Core.CoreObjectsBase
      ArcGIS.Core.Data.UtilityNetwork.NetworkDiagrams.NetworkDiagram

Requirements

Target Platforms: Windows 10, Windows 8.1

See Also

Reference

NetworkDiagram Members
ArcGIS.Core.Data.UtilityNetwork.NetworkDiagrams Namespace