Notifies the set that an object that represents an existing entity must be added to the set.
Assembly: System.Data.Entity (in System.Data.Entity.dll)
Changes to the set may not be visible in an enumeration of the set until changes to that set have been persisted in some manner. This behavior depends on the specific implementation of the IObjectSet<TEntity>.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.