Provides classes that can be used to associate user identifiers (IDs) with security groups for SharePoint Foundation Web site permissions.
User IDs are validated against Active Directory Domain Services (AD°DS) as well as various role or membership providers. SPGroup security information may also be stored in a collection of cross-site groups for the site collection.
|PrincipalInfo||Contains information that represents the user of a SharePoint site.|
|SPPrincipalType||Specifies the scope and other information that is associated with a computer or user name that is maintained and authenticated by Active Directory Domain Services (AD DS).|