[DefaultMemberAttribute("Item")] 
[SerializableAttribute()] 
public class OrderLineCollection : System.Collections.ObjectModel.Collection<OrderLine>, Dynamicweb.eCommerce.Prices.IWithPrice  

class Renderer 
{ 
   public void RenderOrderLines(Order order, Rendering.Template ParentTemplate)
   {

      Rendering.Template orderLineTemplate = ParentTemplate.GetLoop("OrderLines");
      foreach (OrderLine orderLine in order.OrderLines)
   	  {
   		 RenderOrderLine(orderLine, orderLineTemplate);
   		 orderLineTemplate.CommitLoop();
   	  }
   }
   
   public void RenderOrderLine(OrderLine orderLine, Rendering.Template template)
   {
       //TODO: insert your code here.
   }
}