GacIdentityPermissionAttribute Class
Allows security actions for GacIdentityPermission to be applied to code using declarative security. This class cannot be inherited.
Assembly: mscorlib (in mscorlib.dll)
'Declaration <SerializableAttribute> _ <AttributeUsageAttribute(AttributeTargets.Assembly Or AttributeTargets.Class Or AttributeTargets.Struct Or AttributeTargets.Constructor Or AttributeTargets.Method, AllowMultiple := True, _ Inherited := False)> _ <ComVisibleAttribute(True)> _ Public NotInheritable Class GacIdentityPermissionAttribute _ Inherits CodeAccessSecurityAttribute 'Usage Dim instance As GacIdentityPermissionAttribute
This class is used to ensure that callers are registered in the global assembly cache (GAC).
The scope of the declaration that is allowed depends on the SecurityAction value that is used.
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, GacIdentityPermission.
Important Note: |
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In the .NET Framework versions 1.0 and 1.1, demands on the identity permissions are effective even when the calling assembly is fully trusted. That is, although the calling assembly has full trust, a demand for an identity permission fails if the assembly does not meet the demanded criteria. In the .NET Framework version 2.0, demands for identity permissions are ineffective if the calling assembly has full trust. This assures consistency for all permissions, eliminating the treatment of identity permissions as a special case. |
For more information about using attributes, see Extending Metadata Using Attributes.
The following example demonstrates the use of GacIdentityPermissionAttribute.
' To run this sample you must create a strong-name key named snkey.snk ' using the Strong Name tool (sn.exe). Both the library assembly and the ' application assembly that calls it must be signed with that key. ' To run successfully, the application assembly must be in the global ' assembly cache. ' This console application can be created using the following code. 'Imports System 'Imports System.Security 'Imports System.Security.Policy 'Imports System.Security.Principal 'Imports System.Security.Permissions 'Imports Microsoft.VisualBasic 'Imports ClassLibraryVB ' 'Class [MyClass] ' ' Overloads Shared Sub Main(ByVal args() As String) ' Try ' Dim myLib As New Class1 ' myLib.DoNothing() ' ' Console.WriteLine("Exiting the sample.") ' Catch e As Exception ' Console.WriteLine(e.Message) ' End Try ' End Sub 'Main 'End Class '[MyClass Imports System Imports System.Security.Permissions Imports Microsoft.VisualBasic ' Demand that the calling program be in the global assembly cache. <GacIdentityPermissionAttribute(SecurityAction.Demand)> _ Public Class Class1 Public Sub DoNothing() Console.WriteLine("Exiting the library program.") End Sub 'DoNothing End Class 'Class1
System.Attribute
System.Security.Permissions.SecurityAttribute
System.Security.Permissions.CodeAccessSecurityAttribute
System.Security.Permissions.GacIdentityPermissionAttribute
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.
Important Note: