我该怎么说一个产品既属于一个类别，又属于父类别的某些子类别？

Question

这是我的产品类别

public abstract class Product
{
    public Product()
    {
        this.ComplementaryProducts = new HashSet<Product>();
        this.RelatedProducts = new HashSet<Product>();
    }

    [Key]
    public int serialNum { get; set; }
    public double price { get; set; }
    public double? discountPerCent { get; set; }
    public double? discountPrice { get; set; }
    public double weight { get; set; }
    public string description { get; set; }

    public Boolean? specialOffer { get; set; }
    public Boolean? proposedBuy { get; set; }
    public Boolean? firstPage { get; set; }
    public Boolean? visible { get; set; }
    public Boolean? deleted { get; set; }

    public List<string> imgUrls { get; set; }

    public DateTime? dateCreated { get; set; }
    public DateTime? dateUpdated { get; set; }
    public DateTime? dateDeleted { get; set; }

    public ICollection<Product> ComplementaryProducts { get; set; }
    public ICollection<Product> RelatedProducts { get; set; }

    //this two lines i think are not exactly what i want
    public List<Category> categories { get; set; }
    public List<SubCategory> subCategories { get; set; }
}

这是我的类别和子类别类

public class Category
{
    [Key]
    public string name { get; set; }
    List<SubCategory> subCategories { get; set; }
}

public class SubCategory
{
    [Key]
    public string name { get; set; }
}

在最后两个类中，我可以创建类别和子类别的层次结构，但是如何说产品既属于类别又属于父类别的某些子类别？