Notification subscriber does not work...

I have this code in a file in App_Code:

using Dynamicweb;
using Dynamicweb.Extensibility;
using Dynamicweb.eCommerce;
using Dynamicweb.eCommerce.Products;
using Dynamicweb.Templatev2;

[Subscribe(Dynamicweb.Notifications.eCommerce.ProductList.BeforePaging)]
class NevotexProductListNotificationSubscriber : Dynamicweb.Extensibility.NotificationSubscriber
{
    public override void OnNotify(string notification,    Dynamicweb.Extensibility.NotificationArgs args)
    {
        //TODO: Insert code logic here

        Dynamicweb.Notifications.eCommerce.ProductList.BeforePagingArgs fargs = (Dynamicweb.Notifications.eCommerce.ProductList.BeforePagingArgs)args;
        if (fargs.Products.Count>0) fargs.Products.RemoveAt(0);

    }
}

But it does not work, the same number of products is displayed on each page as before.
Also, when I put a breakpoint inside the OnNotify override in an otherwise setup for debugging solution, it is never hit. (The circle icon of the breakpoint is whole though, it is not hollow as it is when the code it is put on is not loaded.)
What can be problem?

Developer forum

Notification subscriber does not work...

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