ArcGIS Pro 2.6 API Reference Guide
RelationshipDescription Class
Members 

ArcGIS.Desktop.Editing Namespace : RelationshipDescription Class
Represents a relationship between two rows.
Object Model
RelationshipDescription ClassRowHandle ClassRowHandle ClassRelationshipClass Class
Syntax
public sealed class RelationshipDescription 
Public NotInheritable Class RelationshipDescription 
Remarks
RelationshipDescription is used to create and delete a relationship bewtween two rows defined by a RelationshipClass. Once defined, use EditOperation.Create to create the relationship and EditOperation.Delete to remove the relationship.
Inheritance Hierarchy

System.Object
   ArcGIS.Desktop.Editing.RelationshipDescription

Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 7

See Also

Reference

RelationshipDescription Members
ArcGIS.Desktop.Editing Namespace