IsolatedStorageFilePermission IsolatedStorageFilePermission IsolatedStorageFilePermission IsolatedStorageFilePermission Class


Specifies the allowed usage of a private virtual file system. This class cannot be inherited.

public ref class IsolatedStorageFilePermission sealed : System::Security::Permissions::IsolatedStoragePermission
public sealed class IsolatedStorageFilePermission : System.Security.Permissions.IsolatedStoragePermission
type IsolatedStorageFilePermission = class
    inherit IsolatedStoragePermission
Public NotInheritable Class IsolatedStorageFilePermission
Inherits IsolatedStoragePermission


The common language runtime (CLR) uses this class to control access to isolated storage.

Isolated storage creates a unique storage area for use by an application or component. It provides true isolation in that the identity of an application uniquely determines the root of a virtual file system, which only that application can access. Thus, each application has its own file area automatically assigned to it. This file area is fully isolated from other applications, making it private to that application.


There is no effect if you use Assert, PermitOnly, or Deny to add stack modifiers for usage or quota. Usage and quota are determined from evidence and a stack walk is not performed for demands, making the above operations ineffective.


IsolatedStorageFilePermission(PermissionState) IsolatedStorageFilePermission(PermissionState) IsolatedStorageFilePermission(PermissionState) IsolatedStorageFilePermission(PermissionState)

Initializes a new instance of the IsolatedStorageFilePermission class with either fully restricted or unrestricted permission as specified.


Assert() Assert() Assert() Assert()

Declares that the calling code can access the resource protected by a permission demand through the code that calls this method, even if callers higher in the stack have not been granted permission to access the resource. Using Assert() can create security issues.

(Inherited from CodeAccessPermission)
Copy() Copy() Copy() Copy()

Creates and returns an identical copy of the current permission.

Demand() Demand() Demand() Demand()

Forces a SecurityException at run time if all callers higher in the call stack have not been granted the permission specified by the current instance.

(Inherited from CodeAccessPermission)
Deny() Deny() Deny() Deny()

Prevents callers higher in the call stack from using the code that calls this method to access the resource specified by the current instance.

(Inherited from CodeAccessPermission)
Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Determines whether the specified CodeAccessPermission object is equal to the current CodeAccessPermission.

(Inherited from CodeAccessPermission)
FromXml(SecurityElement) FromXml(SecurityElement) FromXml(SecurityElement) FromXml(SecurityElement)

Reconstructs a permission with a specified state from an XML encoding.

(Inherited from IsolatedStoragePermission)
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Gets a hash code for the CodeAccessPermission object that is suitable for use in hashing algorithms and data structures such as a hash table.

(Inherited from CodeAccessPermission)
GetType() GetType() GetType() GetType()

Gets the Type of the current instance.

(Inherited from Object)
Intersect(IPermission) Intersect(IPermission) Intersect(IPermission) Intersect(IPermission)

Creates and returns a permission that is the intersection of the current permission and the specified permission.

IsSubsetOf(IPermission) IsSubsetOf(IPermission) IsSubsetOf(IPermission) IsSubsetOf(IPermission)

Determines whether the current permission is a subset of the specified permission.

IsUnrestricted() IsUnrestricted() IsUnrestricted() IsUnrestricted()

Returns a value indicating whether the current permission is unrestricted.

(Inherited from IsolatedStoragePermission)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Creates a shallow copy of the current Object.

(Inherited from Object)
PermitOnly() PermitOnly() PermitOnly() PermitOnly()

Prevents callers higher in the call stack from using the code that calls this method to access all resources except for the resource specified by the current instance.

(Inherited from CodeAccessPermission)
ToString() ToString() ToString() ToString()

Creates and returns a string representation of the current permission object.

(Inherited from CodeAccessPermission)
ToXml() ToXml() ToXml() ToXml()

Creates an XML encoding of the permission and its current state.

Union(IPermission) Union(IPermission) Union(IPermission) Union(IPermission)

Creates a permission that is the union of the current permission and the specified permission.

Explicit Interface Implementations

IPermission.Demand() IPermission.Demand() IPermission.Demand() IPermission.Demand() Inherited from CodeAccessPermission
IStackWalk.Assert() IStackWalk.Assert() IStackWalk.Assert() IStackWalk.Assert() Inherited from CodeAccessPermission
IStackWalk.Demand() IStackWalk.Demand() IStackWalk.Demand() IStackWalk.Demand() Inherited from CodeAccessPermission
IStackWalk.Deny() IStackWalk.Deny() IStackWalk.Deny() IStackWalk.Deny() Inherited from CodeAccessPermission
IStackWalk.PermitOnly() IStackWalk.PermitOnly() IStackWalk.PermitOnly() IStackWalk.PermitOnly() Inherited from CodeAccessPermission


UsageAllowed UsageAllowed UsageAllowed UsageAllowed

Gets or sets the type of isolated storage containment allowed.

(Inherited from IsolatedStoragePermission)
UserQuota UserQuota UserQuota UserQuota

Gets or sets the quota on the overall size of each user's total store.

(Inherited from IsolatedStoragePermission)


for ability of inheritors to provide evidence and view and modify policy. Associated enumerations: ControlEvidence, ControlPolicy

Applies to

See also