In Sharepoint Object model there are two Important namespaces.
The Microsoft.Office.Server namespace is the root
namespace of all Office Server objects and Microsoft.SharePoint is the root namespace
for all WSS objects.
The Chart Below illustrates some of the key classes
contained in each of these namespaces, as well as to which functional area they
belong.
Document Libraries (Microsoft.SharePoint)
SPDocumentLibrary ,
SPPictureLibrary
Business Data Catalog
(Microsoft.Office.Server.ApplicationRegistry.Administration)
EntityCollection ,
ApplicationRegistry
Features (Microsoft.SharePoint)
SPFeatureDefinition, SPFeatureScope,
SPElementDefinition, SPFeature, SPFeatureProperty
Sites
(Microsoft.SharePoint)
SPSite,
SPSiteAdministration, SPSiteCollection, SPWeb
Meetings
(Microsoft.SharePoint.Meetings)
SPMeeting, MtgUtility
User Profiles
(Microsoft.Office.Server.UserProfiles)
UserProfile,
UserProfileManager
Solutions
(Microsoft.SharePoint.Administration)
SPsolution, SPFeatureReceiver,
SPSolutionCollection
Lists (Microsoft.SharePoint)
SPList, SPListItem,
SPListItemCollection
Notes:
* To use the SharePoint API, your
code must reside on one of the machines in a SharePoint
application server
farm. Your code can still work with other sites in the farm from any
other
site in the farm, but you cannot, for example, work with the SharePoint API from
a
machine on which MOSS or WSS is not installed.
* The only practical
way to consume SharePoint data and functionality from a remote client is to use
the SharePoint web services.
* The object model is not designed to
support Remoting.
* To add a reference to a Sharepoint API, Right-click
the project(in VS) and select Add Reference. Click the Browse tab and select
the
following directory:
C:\program files\common files\microsoft
shared\web server extensions\12\isapi
Other Related Posts:
SharePoint 2010 Object model
The Backward Compatibility of SharePoint 2010 Object Model