EF Code-First 自增列种子如何设置

[Key]
[DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
public int UserId { get; set; }
public string UserName { get; set; }
想让用户ID,从100000开始自增，请问怎么配置？

http://stackoverflow.com/questions/5974554/ef-code-first-how-to-set-identity-seed

http://stackoverflow.com/questions/11255263/dataannotations-set-identity-seed-value-on-primary-key-with-code-first

 public class MyInitializer : DropCreateDatabaseIfModelChanges<MyContext> 
{   
  protected override void Seed(MyContext context) 
  {   
    context.Database.ExecuteSqlCommand("DBCC CHECKIDENT ('Account', RESEED, 1)");
  }  
}

protected void Application_Start()
{
  Database.SetInitializer(new MyInitializer());
  AreaRegistration.RegisterAllAreas();

  RegisterGlobalFilters(GlobalFilters.Filters);
  RegisterRoutes(RouteTable.Routes);
}