ArcObjects Library Reference (GeoDatabase)  

IRemoteDatabaseWorkspace Interface

Indicator interface that identifies a remote datasbase workspace.

Product Availability

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

CoClasses that implement IRemoteDatabaseWorkspace

CoClasses and Classes Description
Sde3Workspace (esriDataSourcesGDB) Esri SDE (3.x) Feature Database.
Sde4Workspace (esriDataSourcesGDB) Esri SDE (4.x) Feature Database.