public object GetPropertyValue( 
   string PropertyName 
)

class MyPage : System.Web.UI.Page
{
   private Dynamicweb.eCommerce.Orders.OrderCollection.SortOrderType _sortOrder;
   private string _fieldName;
   public int Compare(object x, object y)
   {
       Dynamicweb.eCommerce.Orders.Order order1 = (Dynamicweb.eCommerce.Orders.Order)x;
       Dynamicweb.eCommerce.Orders.Order order2 = (Dynamicweb.eCommerce.Orders.Order)y;

       string fieldType = null;
       try
       {
           fieldType = order1.GetPropertyType(_fieldName);
       }
       catch
       {
           return 0;
       }

       try
       {
           switch (fieldType.ToLower())
           {
               case "boolean":
                   bool order1bool = false;
                   order1bool = (bool)order1.GetPropertyValue(_fieldName);

                   bool order2bool = false;
                   order2bool = (bool)order2.GetPropertyValue(_fieldName);

                   return (order1bool.CompareTo(order2bool) * (int)_sortOrder);
               case "integer":
                  int order1int = 0;
                  order1int = (int)order1.GetPropertyValue(_fieldName);

                  int order2int = 0;
                  order2int = (int)order2.GetPropertyValue(_fieldName);

                  return (order1int.CompareTo(order2int) * (int)_sortOrder);
              case "string":
                  string order1string = null;
                  order1string = (string)order1.GetPropertyValue(_fieldName);

                  string order2string = null;
                  order2string = (string)order2.GetPropertyValue(_fieldName);

                  return (order1string.CompareTo(order2string) * (int)_sortOrder);
              default:
                  return 0;
          }
      }
      catch
      {
          return 0;
      }
   }
}