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IsolatedStorageFilePermissionAttribute Class

Allows security actions for IsolatedStorageFilePermission to be applied to code using declarative security. This class cannot be inherited.

For a list of all members of this type, see IsolatedStorageFilePermissionAttribute Members.

System.Object
   System.Attribute
      System.Security.Permissions.SecurityAttribute
         System.Security.Permissions.CodeAccessSecurityAttribute
            System.Security.Permissions.IsolatedStoragePermissionAttribute
               System.Security.Permissions.IsolatedStorageFilePermissionAttribute

[Visual Basic]
<AttributeUsage(AttributeTargets.Assembly Or AttributeTargets.Class _
   Or AttributeTargets.Struct Or AttributeTargets.Constructor Or _
   AttributeTargets.Method)>
<Serializable>
NotInheritable Public Class _
   IsolatedStorageFilePermissionAttribute
   Inherits IsolatedStoragePermissionAttribute
[C#]
[AttributeUsage(AttributeTargets.Assembly | AttributeTargets.Class
   | AttributeTargets.Struct | AttributeTargets.Constructor |
   AttributeTargets.Method)]
[Serializable]
public sealed class IsolatedStorageFilePermissionAttribute :
   IsolatedStoragePermissionAttribute
[C++]
[AttributeUsage(AttributeTargets::Assembly |
   AttributeTargets::Class | AttributeTargets::Struct |
   AttributeTargets::Constructor | AttributeTargets::Method)]
[Serializable]
public __gc __sealed class IsolatedStorageFilePermissionAttribute
   : public IsolatedStoragePermissionAttribute
[JScript]
public
   AttributeUsage(AttributeTargets.Assembly | AttributeTargets.Class |
   AttributeTargets.Struct | AttributeTargets.Constructor |
   AttributeTargets.Method)
 Serializable
class IsolatedStorageFilePermissionAttribute extends
   IsolatedStoragePermissionAttribute

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Remarks

The scope of the declaration that is allowed depends on the SecurityAction 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.

Example

[Visual Basic, C#, C++] The following example of a declarative attribute shows the correct way to request IsolatedStorageFilePermission, states that you must have at least this permission to run your code, and requests a maximum user quota of 5 MB.

[Visual Basic] 
<Assembly: IsolatedStorageFilePermissionAttribute( _
SecurityAction.RequestMinimum, UserQuota := 5242880)>
'In Visual Basic, you must specify that you are using the assembly scope when making a request.

[C#] 
[assembly:IsolatedStorageFilePermissionAttribute(
SecurityAction.RequestMinimum, UserQuota=5242880)]
//In C#, you must specify that you are using the assembly scope when making a request.

[C++] 
[assembly:IsolatedStorageFilePermissionAttribute(
SecurityAction::RequestMinimum, UserQuota=5242880)];
//In C++, you must specify that you are using the assembly scope when making a request.

[Visual Basic, C#, C++] The following example shows how to demand that the calling code has unrestricted IsolatedStorageFilePermission at link time. Demands are typically made in managed libraries (DLLs) to help protect methods or classes from potentially harmful code.

[Visual Basic] 
<IsolatedStorageFilePermissionAttribute( _
 SecurityAction.Demand, Unrestricted := True)> _
 Public Class SampleClass

[C#] 
[IsolatedStorageFilePermissionAttribute(SecurityAction.Demand,
Unrestricted=true)]

[C++] 
[IsolatedStorageFilePermissionAttribute(SecurityAction::Demand,
Unrestricted=true)]

[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button Language Filter in the upper-left corner of the page.

Requirements

Namespace: System.Security.Permissions

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

Assembly: Mscorlib (in Mscorlib.dll)

See Also

IsolatedStorageFilePermissionAttribute Members | System.Security.Permissions Namespace | Extending Metadata Using Attributes | IsolatedStorageFilePermission | IsolatedStoragePermission | IsolatedStoragePermissionAttribute | IsolatedStorageContainment

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