Clean Domain-driven Design article

Product.cs

public sealed class Product : IdentityBase
{
  private Product() : base()
  {
  }

  private Product(Guid productId)
    : this(productId, string.Empty, 0.0D, string.Empty)
  {
  }

  private Product(Guid productId, string name, double price, string desc)
    : this(GenerateId(), productId, name, price, desc)
  { 
  }

  private Product(Guid id, Guid productId, string name, double price, string desc)
  {
    Id = id;
    ProductId = productId;
    Name = name;
    Price = price;
    Desc = desc;
  }

  public static Product Load(Guid productId)
  {
    return new Product(productId);
  }

  public static Product Load(Guid productId, string name, double price, string desc)
  {
    return new Product(productId, name, price, desc);
  }

  public Guid ProductId { get; private set; }

  [NotMapped] public string Name { get; private set; }

  [NotMapped] public double Price { get; private set; }

  [NotMapped] public string Desc { get; private set; }

  public CartItem CartItem { get; private set; }

  public Product LinkCartItem(CartItem cartItem)
  {
    CartItem = cartItem;
    return this;
  }
}