Updated: September 2008
Allows security actions for PrincipalPermission to be applied to code using declarative security. This class cannot be inherited.
Assembly: mscorlib (in mscorlib.dll)
'Declaration <SerializableAttribute> _ <ComVisibleAttribute(True)> _ <AttributeUsageAttribute(AttributeTargets.Class Or AttributeTargets.Method, AllowMultiple := True, _ Inherited := False)> _ Public NotInheritable Class PrincipalPermissionAttribute _ Inherits CodeAccessSecurityAttribute 'Usage Dim instance As PrincipalPermissionAttribute
can be used to declaratively demand that users running your code belong to a specified role or have been authenticated. Use of Unrestricted creates a PrincipalPermission with Authenticated set to true and Name and Role set to Nothing.
The scope of the declaration that is allowed depends on the SecurityAction that is used. cannot be applied at the assembly level.
The security information declared by a security attribute is stored in the metadata of the attribute target and is accessed by the system at run time. Security attributes are used only for declarative security. For imperative security, use the corresponding permission class.
Before you use this class to demand principal permission, you must set the current application domain's principal policy to the enumeration value WindowsPrincipal. By default, the principal policy is set to UnauthenticatedPrincipal. If you do not set the principal policy to WindowsPrincipal, a demand for principal permission will fail. The following code should be executed before the principal permission is demanded: AppDomain.CurrentDomain.SetPrincipalPolicy(PrincipalPolicy.WindowsPrincipal).
The following example demonstrates how the class is used declaratively to demand that the current user be an administrator.
In Windows Vista, User Account Control (UAC) determines the privileges of a user. If you are a member of the Built-in Administrators group, you are assigned two run-time access tokens: a standard user access token and an administrator access token. By default, you are in the standard user role. To execute the code that requires you to be an administrator, you must first elevate your privileges from standard user to administrator. You can do this when you start an application by right-clicking the application icon and indicating that you want to run as an administrator.
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.