Microsoft ha rilasciato due file XML per provvedere al supporto per l'intellisense di visual studio .net per le classi degli assembly Microsoft.Sharepoint e Microsoft.Sharepoint.Portal; il file XML per Windows Sharepoint Services provvede il supporto per questi namespace:

Microsoft.SharePoint
Microsoft.SharePoint.Administration
Microsoft.SharePoint.Meetings
Microsoft.SharePoint.SoapServer
Microsoft.SharePoint.Utilities
Microsoft.SharePoint.WebControls
Microsoft.SharePoint.WebPartPages
Microsoft.SharePoint.WebPartPages.Communication

Download: http://www.microsoft.com/downloads/details.aspx?familyid=9f7b5831-6be6-48f8-9f9a-2eb9dc57afad&displaylang=en

Il file XML per Sharepoint Portal, invece, provvede il supporto per questi altri namespace:

Microsoft.SharePoint.Portal
Microsoft.SharePoint.Portal.Alerts
Microsoft.SharePoint.Portal.Alerts.NotificationTypes
Microsoft.SharePoint.Portal.Alerts.Types
Microsoft.SharePoint.Portal.Audience
Microsoft.SharePoint.Portal.Search
Microsoft.SharePoint.Portal.Search.ObjectModel
Microsoft.SharePoint.Portal.Security
Microsoft.SharePoint.Portal.SiteData
Microsoft.SharePoint.Portal.Topology
Microsoft.SharePoint.Portal.UserProfiles
Microsoft.SharePoint.Portal.WebControls
Microsoft.SharePoint.Portal.Admin.Search
Microsoft.SharePoint.Portal.SingleSignon
Microsoft.SharePoint.Portal.SingleSignon.Security

Download: http://www.microsoft.com/downloads/details.aspx?familyid=17F00F0D-659A-433C-BF0D-A7628B00FE17&displaylang=en