public void RemoveNoneActiveProducts()

class MyPage : System.Web.UI.Page
{
   public void SaveToSession(Dynamicweb.eCommerce.Orders.Order EcomCart)
   {
       //Process the cart and save it to session
       {
           if (EcomCart != null)
           {
               //Save the cart
               //Note: Cart must be saved in a session variable BEFORE the call to RemoveNoneActiveProducts below.
               //Otherwise an infinite loop could be made!
               Dynamicweb.eCommerce.Common.Context.SetCart(EcomCart);

               //Remove cached prices
               EcomCart._CachedPrice = null;
               EcomCart._CachedPriceBeforeFees = null;

               //Check if all the products are still available
               EcomCart.RemoveNoneActiveProducts();
           }
       }
   }
}