Extend product/category

Extend IProduct

public class ProductFac : IPerStoreFactory<IProduct>
{
    public IProduct Create(UmbracoContent item, IStore store)
    {
        return new ExtendProduct(item, store);
    }
}

public class ExtendProduct : Product
{
    public ExtendProduct(UmbracoContent item, IStore store) : base(item, store)
    {

    }

    public string NewProperty
    {
        get
        {
            return "";
        }
    }
    
    public override List<IPrice> Prices 
    {
        get
        {
            var list = new List<IPrice>();

            if (_contextAccessor.HttpContext.User.Identity.IsAuthenticated)
            {
                var _cs = _contextAccessor.HttpContext.RequestServices.GetService<CustomerService>();
                var _discountService = _contextAccessor.HttpContext.RequestServices.GetService<DiscountService>();
                var customer = _cs.Get();

                if (customer != null)
                {
                    var discountPrice = _discountService.GetDiscountPricePerCustomer(customer.Id, SKU).Result;
                 
                    if (discountPrice != null && discountPrice.Price != 0)
                    {

                        list.Add(new Price(
                        discountPrice.Price,
                        Store.Currency,
                        Vat,
                        Store.VatIncludedInPrice,
                        null,
                        1
                        ));

                        return list;
                    }
                }

            }

            list.Add(ListPrice);

            return list;

        }
    }
    
    

}

Extend ICategory

public class CategoryFac : IPerStoreFactory<ICategory>
{
    public ICategory Create(UmbracoContent item, IStore store)
    {
        return new ExtendCategory(item, store);
    }
}

public class ExtendCategory: Category
{
    public ExtendCategory(UmbracoContent item, IStore store) : base(item, store)
    {

    }

    public string CustomProperty
    {
        get
        {
            return this.GetValue<string>("number");
        }
    }
}

Register the override

    [ComposeAfter(typeof(Ekom.Umb.EkomComposer))]
    class EkomOverrides : IComposer
    {
        public void Compose(IUmbracoBuilder builder)
        {
            builder.Services.AddSingleton<IPerStoreFactory<IProduct>, ProductFac>();
            builder.Services.AddSingleton<IPerStoreFactory<ICategory>, CategoryFac>();
        }
    }