Provides a durable reference to an object that is an instance of an entity type.
Assembly: System.Data.Entity (in System.Data.Entity.dll)
The objects are immutable; that is, after they are constructed they cannot be modified.
For more information, see Working with Entity Keys (Entity Framework).
Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.