System.Security.Principal Namespace

The System.Security.Principal namespace defines a principal object that represents the security context under which code is running. For more information, see Role-Based Security.

Classes

GenericIdentity	Represents a generic user.
GenericPrincipal	Represents a generic principal.
IdentityNotMappedException	Represents an exception for a principal whose identity could not be mapped to a known identity.
IdentityReference	Represents an identity and is the base class for the NTAccount and SecurityIdentifier classes. This class does not provide a public constructor, and therefore cannot be inherited.
IdentityReferenceCollection	Represents a collection of IdentityReference objects and provides a means of converting sets of IdentityReference-derived objects to IdentityReference-derived types.
NTAccount	Represents a user or group account.
SecurityIdentifier	Represents a security identifier (SID) and provides marshaling and comparison operations for SIDs.
WindowsIdentity	Represents a Windows user.
WindowsImpersonationContext	Represents the Windows user prior to an impersonation operation.
WindowsPrincipal	Enables code to check the Windows group membership of a Windows user.

Interfaces

IIdentity	Defines the basic functionality of an identity object.
IPrincipal	Defines the basic functionality of a principal object.

Enums

PrincipalPolicy	Specifies how principal and identity objects should be created for an application domain. The default is `UnauthenticatedPrincipal`.
TokenAccessLevels	Defines the privileges of the user account associated with the access token.
TokenImpersonationLevel	Defines security impersonation levels. Security impersonation levels govern the degree to which a server process can act on behalf of a client process.
WellKnownSidType	Defines a set of commonly used security identifiers (SIDs).
WindowsAccountType	Specifies the type of Windows account used.
WindowsBuiltInRole	Specifies common roles to be used with IsInRole(String).