[DefaultMemberAttribute("Item")] 
[SerializableAttribute()] 
public class MultiplePriceCollection : System.Collections.ObjectModel.Collection<MultiplePrice> 

class MyPage : System.Web.UI.Page
{
    private Dynamicweb.eCommerce.Products.Product product;
    private SortedList _objectList;
 
    private void Page_Load(System.Object sender, System.EventArgs e)
    {
        product = (Dynamicweb.eCommerce.Products.Product)Session["Ecom.Backend.Product"];
    }

    public SortedList objectList
    {
        get { return _objectList; }
        set { _objectList = value; }
    }

    public void addObjeckList(int level)
    {
        if (!string.IsNullOrEmpty(Base.ChkString(product.PriceMatrixQuantitySpecification)))
        {
            string multiSpecs = product.PriceMatrixQuantitySpecification.Replace(":", ";");
            Dynamicweb.eCommerce.Prices.MultiplePriceCollection multipleprices = new Dynamicweb.eCommerce.Prices.MultiplePriceCollection();
            string[] QuantitySpecArr = multiSpecs.Split(';');
            System.Collections.DictionaryEntry Item = default(System.Collections.DictionaryEntry);
            SortedList sortedList = new SortedList();

            foreach (string quantity in QuantitySpecArr)
            {
                if (Base.ChkDouble(quantity) > 0)
                {
                    sortedList.Add(quantity, quantity);
                }
            }

            foreach (DictionaryEntry Item_loopVariable in sortedList)
            {
                Item = Item_loopVariable;
                Dynamicweb.eCommerce.Prices.MultiplePrice multiplePrice = new Dynamicweb.eCommerce.Prices.MultiplePrice();
                multiplePrice.Quantity = Base.ChkDouble(Item.Key);
                multipleprices.Add(multiplePrice);
            }
            if (multipleprices.Count > 0)
            {
                objectList.Add(level, multipleprices);
            }
        }
    }
}