How to turn off optimistic concurrency check in SqlCe, linq-to-sql (SqlMetal)?

Using: VS2008, Sql CE 3.5.

When I try to save an entity from a detached context, i'm not able to. And instead have to map each property.

    Public Sub Save(ByVal user As Users)
    Dim ctx As New TestDB(connection)

        Dim q = (From n In ctx.Users Where user.Id = id Select n).Single
        q.MapData(user)
        ' ctx.Users.Attach(user, q)             ' Does not work
        ' ctx.Users.Attach(user, True)          ' Does not work
    End If
    ctx.SubmitChanges()

It's indicated that turning off optimistic concurrency check will avoid this problem. (As answer here: Entity attachment issues in LINQ).

But how do I turn that off? Do I manually have to edit the SqlM开发者_JAVA技巧etal-generated datacontext classes in some way? Or can it be done simpler?

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Ok, I added this attribute to all properties in the entity classes. Not sure if that's the best way though.

UpdateCheck:=UpdateCheck.Never