在Entity Framework 4 Code Only(CTP3)中,如何为POCO的EntityConfiguration类中的属性设置默认值? public class Person { public int Id { get; set; } public string Name { get; set; } public DateTime CreatedOn { get; set; } } public class PersonConfiguration : EntityConfiguration<Person> { public PersonConfiguration() { Property(p => p.Id).IsIdentity(); Property(p => p.Name).HasMaxLength(100); //set default value for CreatedOn ? } }