How not persist property EF4 code first?

.net, c#, ef4-code-only, entity-framework, entity-framework-4

Solution

In EF Code-First CTP5, you can use the `[NotMapped]` annotation.

using System.ComponentModel.DataAnnotations;
public class Song
{
    public int Id { get; set; }
    public string Title { get; set; }

    [NotMapped]
    public int Track { get; set; }

Problem

How do I make non persisted properties using codefirst EF4? MS says there is a StoreIgnore Attribute, but I cannot find it. http://blogs.msdn.com/b/efdesign/archive/2010/03/30/data-annotations-in-the-entity-framework-and-code-first.aspx Is there a way to set this up using EntityConfiguration?

Original source