ArcObjects Library Reference (GeoDatabase)  

esriRelCardinality Constants

Relationship Cardinality.

Constant Value Description
esriRelCardinalityOneToOne 1 One To One.
esriRelCardinalityOneToMany 2 One To Many.
esriRelCardinalityManyToMany 3 Many To Many.

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.

.NET Related Topics

Creating relationship classes | Geodatabase | Joining data