You can access all nine classes in the Commerce Server Base Class Library (CSBCL) programmatically from within the Microsoft.CommerceServer.Runtime namespace. You use these seven classes most often when you write your Commerce Server 2002 application's business functionality:

Microsoft.CommerceServer.Runtime Microsoft.CommerceServer.Runtime.Catalog Microsoft.CommerceServer.Runtime.Profiles Microsoft.CommerceServer.Runtime.Orders Microsoft.CommerceServer.Runtime.Pipelines Microsoft.CommerceServer.Runtime.Targeting Microsoft.CommerceServer.Runtime.Caching

The remaining two classes are useful for configuration- and diagnostics-related development:

Microsoft.CommerceServer.Runtime.Configuration Microsoft.CommerceServer.Runtime.Diagnostics