Developer forum

I'm trying to use code first item creation, but cant get the inheritance working.

   [Item(Name = "Paragraph", Description = "Root paragraph, in which all other paragraphs inherit settings from.")]
    [Category("Example")]
    [Icon(Dynamicweb.Core.UI.Icons.KnownIcon.Dashboard)]
    [TitleField("Title")]
    [AreaRule,
        StructureRule(StructureContextType.Paragraphs),
        ChildRule(false)]
    public class Paragraph : ItemEntry
    {
        [Group("General")]
        public string Title { get; set; }
    }

[Item(Name = "Default Paragraph", Description = "Standard paragraph for all purpose use.")]
    [Category("Example")]
    [Icon(Dynamicweb.Core.UI.Icons.KnownIcon.Dashboard)]
    [TitleField("Title")]
    [AreaRule,
        StructureRule(StructureContextType.Paragraphs),
        ChildRule(false)]
    [ModuleAttachmentRule(true)]
    public class DefaultParagraph : Paragraph
    {
        [Group("General")]
        [RichText]
        public string Content { get; set; }
    }

This result in two items in the same folder, and DefaultParagraph is not inheriting Paragraph, what am I missing?