System.Security.Principal Namespace Reference

Classes
class	GenericIdentity
class	GenericPrincipal
interface	IIdentity
interface	IPrincipal
class	WindowsIdentity
class	WindowsImpersonationContext

Enumerations
enum	TokenImpersonationLevel {   None , Anonymous , Identification , Impersonation ,   Delegation }
enum	WindowsAccountType { Normal , Guest , System , Anonymous }