Namespace: Microsoft.CommerceServer.Runtime.Orders
Assembly: Microsoft.CommerceServer.Runtime (in Microsoft.CommerceServer.Runtime.dll)
Save Method
ref: http://msdn.microsoft.com/en-us/library/aa529472.aspx
CS2007 Orders and Marketing Systems
The Marketing and Orders systems follow the desired convention of storing data in UTC in the database and returning them in local time at the API layer. This includes the format of DateTimes in the campaigns caches.
Note: When migrating data for these systems from CS2000 or CS2002, existing data for Orders and Marketing will be converted from local time to UTC since the previous versions of the product stored the data in local time for these resources.
ref: http://blogs.msdn.com/b/commerce/archive/2006/12/12/commerce-server-handling-of-datetime-values-and-time-zones.aspx
MODIFYING PURCHASE ORDER IN COMMERCE SERVER, CS2007
http://microsoftblog.co.in/commerceserver/modifying-purchase-order-in-commerce-server/
Commerce Server 2007 – Extending the PurchaseOrder
http://cavemansblog.wordpress.com/2008/02/11/commerce-server-2007-extending-the-purchaseorder/