SharePoint Server 2010 Core Class Library
This class library for Microsoft SharePoint Server 2010 includes core namespaces that contain utility classes, utility methods, and Web controls for building user interfaces, and other namespaces that are for internal use only.
The following table lists the public namespaces in this class library that you can use to develop your solutions.
Contains interfaces and helper classes that support event receivers, timer jobs, and iteration over sites, lists, and list items.
Contains classes for creating user interfaces for SharePoint Server 2010.
Provides a cache interface that can be used to store objects of any type.