.NET Namespace: System.Security.Principal

IPrincipal

PrincipalPolicy

SecurityIdentifier

IdentityReference

IIdentity

GenericIdentity

GenericPrincipal

TokenAccessLevels

TokenImpersonationLevel

WindowsAccountType

WindowsIdentity

WindowsImpersonationContext

IdentityReferenceCollection

WindowsBuiltInRole

WindowsPrincipal

IdentityReference[]

NTAccount

WellKnownSidType

IdentityNotMappedException