public class Publication : EntityBase    {        public int PublicationId { get; set; }        public string Name { get; set; }         public RelatedEntityList<Subscriber> Subscribers { get; set; }    }

public class Subscriber : EntityBase    {        publicint SubscriberId { get; set; }        publicstring Name { get; set; }         publicRelatedEntityList<Publication> Publications { get; set; }    }
The context includes:
        public DbSet<Publication> Publications { get; set; }         public DbSet<Subscriber> Subscribers { get; set; }
This generated the tables I expect: Subscribers, Publications, and SubscriberPublications.  In the configuration seed method, I can add some sample data:
            context.Publications.AddOrUpdate(newPublication { PublicationId = 1, Name = "pub 1" });            context.Publications.AddOrUpdate(newPublication { PublicationId = 2, Name = "pub 2" });             context.Subscribers.AddOrUpdate(newSubscriber { SubscriberId = 1, Name = "Dude 1" });            context.Subscribers.AddOrUpdate(newSubscriber { SubscriberId = 2, Name = "Dude 2" });
What I don't seem to be able to do is
            context.Publications.AddOrUpdate(newPublication {PublicationId = 1, Name = "pub 1", Subscribers.Add(somedude) });
and so my assocation table SubscriberPublications is empty.  
The EF forum recommended way with plain EF,
context.Publications.AddOrUpdate(
new Publication { 
	PublicationId = 1, 
	Name = "pub 1", 
	Subscribers = new List<Subscriber>() 
		{ new Subscriber { SubscriberId = 1, Name = "Dude 1" }, 
		new Subscriber { SubscriberId = 2, Name = "Dude 2" } } });
 
modified for my classes:
            context.Publications.AddOrUpdate(                new Publication                {                    PublicationId = 1,                    Name = "pub 1",                    Subscribers = new IdeaBlade.EntityModel.RelatedEntityList<Subscriber>()                        {                            new Subscriber                            {                                 SubscriberId=1,                                 Name="Dude 1"                            }}                }); 
 
results in this exception:
Running Seed method.System.NotSupportedException: Sets on List Navigation properties are not supported   at IdeaBlade.EntityModel.NavigationListEntityProperty`2.SetValue(Object instance, Object value)   at IdeaBlade.Aop.ProvideEntityAspect.PropertySetInterceptor(LocationInterceptionArgs args)   at DbModel.Models.Publication.set_Subscribers(RelatedEntityList`1 value) in :line 0   at DbModel.Migrations.Configuration.Seed(DbModelContext context) in H:\Projects\2 - Research Projects\EFCF\SilverlightApplication2\DbModel\Migrations\Configuration.cs:line 42   at System.Data.Entity.Migrations.DbMigrationsConfiguration`1.OnSeed(DbContext context)   at System.Data.Entity.Migrations.DbMigrator.SeedDatabase()   at System.Data.Entity.Migrations.Infrastructure.MigratorLoggingDecorator.SeedDatabase()   at System.Data.Entity.Migrations.DbMigrator.Upgrade(IEnumerable`1 pendingMigrations, String targetMigrationId, String lastMigrationId)   at System.Data.Entity.Migrations.Infrastructure.MigratorLoggingDecorator.Upgrade(IEnumerable`1 pendingMigrations, String targetMigrationId, String lastMigrationId)   at System.Data.Entity.Migrations.DbMigrator.Update(String targetMigration)   at System.Data.Entity.Migrations.Infrastructure.MigratorBase.Update(String targetMigration)   at System.Data.Entity.Migrations.Design.ToolingFacade.UpdateRunner.RunCore()   at System.Data.Entity.Migrations.Design.ToolingFacade.BaseRunner.Run()Sets on List Navigation properties are not supported
Is there a way to populate the assocation table from the seed method with DF?
Thanks.