Entity Framework Code First DataAnnotations [ComplexType] attribute
Example
using System.ComponentModel.DataAnnotations.Schema;
[ComplexType]
public class BlogDetails
{
public DateTime? DateCreated { get; set; }
[MaxLength(250)]
public string Description { get; set; }
}
public class Blog
{
...
public BlogDetails BlogDetail { get; set; }
}
Mark the class as complex type in Entity Framework.
Complex Types (Or Value Objects In Domain Driven Design) cannot be tracked on their own but they are tracked as part of an entity. This is why BlogDetails in the example does not have a key property.
They can be useful when describing domain entities across multiple classes and layering those classes into a complete entity.
