Returns the key for the related object.
Assembly: System.Data.Entity (in System.Data.Entity.dll)
Having the entity key of the related object available on the EntityReference object makes it easier to return information about the related object without having to load it from the data source.
Exposing the EntityKey of the related object on the EntityReference object also enables Object Service to dynamically create an association between two attached objects and delete an object without having to load the related ends. For more information, see Adding, Modifying, and Deleting Objects (Entity Framework).
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.