The EntityObject Generator can be used to generate a strongly-typed ObjectContext class and entity classes that derive from EntityObject from an Entity Framework model created using the EF Designer.
Once installed, you can right-click on the EF Designer surface and select "Add Code Generation Item..." from the menu.
If you are using the EF Designer in Visual Studio 2010 this template is already installed.
Consider using the DbContext Generator
The DbContext Generator is now the recommended template for new applications. The DbContext Generator takes advantage of the simpler DbContext API. The EntityObject Generator continues to be available to support existing applications.