gistfile1.cs

public partial class ToyContext : DbContext
{
  static ToyContext()
  {
    Database.SetInitializer(null);
  {

  public ToyContext()
   : base("Name=ToyContext"){}

  public DbSet Orders { get; set; }
  public DbSet Person { get; set; }
  public DbSet Preferences { get; set; }
  protected override void OnModelCreating(DbModelBuilder modelBuilder)
  {
    modelBuilder.Configurations.Add(new OrderMap());
    modelBuilder.Configurations.Add(new PersonMap());
    modelBuilder.Configurations.Add(new PreferenceMap());
  }
}