ArcGIS Pro 2.7 API Reference Guide
AttributedRelationship Class
Members 

ArcGIS.Core.Data Namespace : AttributedRelationship Class
Represents a pair of related rows (or features) from a geodatabase with extra information stored as a row in an intermediate table.
Object Model
AttributedRelationship ClassRow ClassRow Class
Syntax
public sealed class AttributedRelationship : Relationship, System.IDisposable  
Public NotInheritable Class AttributedRelationship 
   Inherits Relationship
   Implements System.IDisposable 
Remarks
An AttributedRelationship represents a relationship between rows and/or features where the tables or feature classes must participate in an AttributedRelationshipClass. AttributedRelationships are created using either AttributedRelationshipClass.CreateRelationship (if the AttributedRelationshipClass does not have user-defined attributes other than those created by the system) or AttributedRelationshipClass.CreateRelationship (if the AttributedRelationshipClass does have user-defined attributes beyond those created by the system). They are returned using AttributedRelationshipClass.GetRelationshipsForOriginRows or AttributedRelationshipClass.GetRelationshipsForDestinationRows.
Inheritance Hierarchy

System.Object
   ArcGIS.Core.CoreObjectsBase
      ArcGIS.Core.Data.Relationship
         ArcGIS.Core.Data.AttributedRelationship

Requirements

Target Platforms: Windows 10, Windows 8.1

See Also

Reference

AttributedRelationship Members
ArcGIS.Core.Data Namespace
Relationship Class