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RegistryPermission Class

Controls the ability to access registry variables. This class cannot be inherited.

System.Object
  System.Security.CodeAccessPermission
    System.Security.Permissions.RegistryPermission

Namespace:  System.Security.Permissions
Assembly:  mscorlib (in mscorlib.dll)

[SerializableAttribute]
[ComVisibleAttribute(true)]
public sealed class RegistryPermission : CodeAccessPermission, 
	IUnrestrictedPermission

The RegistryPermission type exposes the following members.

  NameDescription
Public methodRegistryPermission(PermissionState)Initializes a new instance of the RegistryPermission class with either fully restricted or unrestricted permission as specified.
Public methodRegistryPermission(RegistryPermissionAccess, String)Initializes a new instance of the RegistryPermission class with the specified access to the specified registry variables.
Public methodRegistryPermission(RegistryPermissionAccess, AccessControlActions, String)Initializes a new instance of the RegistryPermission class with the specified access to the specified registry variables and the specified access rights to registry control information.
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  NameDescription
Public methodAddPathList(RegistryPermissionAccess, String)Adds access for the specified registry variables to the existing state of the permission.
Public methodAddPathList(RegistryPermissionAccess, AccessControlActions, String)Adds access for the specified registry variables to the existing state of the permission, specifying registry permission access and access control actions.
Public methodAssertDeclares 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.)
Public methodCopyCreates and returns an identical copy of the current permission. (Overrides CodeAccessPermission.Copy().)
Public methodDemandForces 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.)
Public methodDeny Obsolete. 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.)
Public methodEqualsDetermines whether the specified CodeAccessPermission object is equal to the current CodeAccessPermission. (Inherited from CodeAccessPermission.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodFromXmlReconstructs a permission with a specified state from an XML encoding. (Overrides CodeAccessPermission.FromXml(SecurityElement).)
Public methodGetHashCodeGets 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.)
Public methodGetPathListGets paths for all registry variables with the specified RegistryPermissionAccess.
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodIntersectCreates and returns a permission that is the intersection of the current permission and the specified permission. (Overrides CodeAccessPermission.Intersect(IPermission).)
Public methodIsSubsetOfDetermines whether the current permission is a subset of the specified permission. (Overrides CodeAccessPermission.IsSubsetOf(IPermission).)
Public methodIsUnrestrictedReturns a value indicating whether the current permission is unrestricted.
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodPermitOnlyPrevents 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.)
Public methodSetPathListSets new access for the specified registry variable names to the existing state of the permission.
Public methodToStringCreates and returns a string representation of the current permission object. (Inherited from CodeAccessPermission.)
Public methodToXmlCreates an XML encoding of the permission and its current state. (Overrides CodeAccessPermission.ToXml().)
Public methodUnionCreates a permission that is the union of the current permission and the specified permission. (Overrides CodeAccessPermission.Union(IPermission).)
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RegistryPermission describes protected operations on registry variables. Registry variables should not be stored in memory locations where code without RegistryPermission can access them. If the registry object is passed to an untrusted caller it can be misused.

The allowed registry access types are defined by RegistryPermissionAccess. If more than one type of access is desired, they can be combined using the bitwise OR operation as shown in the code sample that follows.

Registry permission is defined in terms of canonical absolute paths; checks should always be made with canonical pathnames. Key access implies access to all values it contains and all variables under it.

NoteNote

In versions of the .NET Framework before the .NET Framework version 4, you could use the CodeAccessPermission.Deny method to prevent inadvertent access to system resources by trusted code. Deny is now obsolete, and access to resources is now determined solely by the granted permission set for an assembly. To limit access to files, you must run partially trusted code in a sandbox and assign it permissions only to resources that the code is allowed to access. For information about running an application in a sandbox, see How to: Run Partially Trusted Code in a Sandbox.

In the following code example, the RegistryPermission f represents permission to read the values from the CentralProcessor key. Read and Write are RegistryPermissionAccess enumeration values.


RegistryPermission f = new RegistryPermission(
RegistryPermissionAccess.Read, 
"HKEY_LOCAL_MACHINE\\HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\0");


The following code example adds permission to read from and write to the FloatingPointProcessor key to the RegistryPermission f.


f.AddPathList(
RegistryPermissionAccess.Write | RegistryPermissionAccess.Read,
"HKEY_LOCAL_MACHINE\\HARDWARE\\DESCRIPTION\\System\\FloatingPointProcessor\\0");


The RegistryPermission f now represents the permission to read from the CentralProcessor key and to read from and write to the FloatingPointProcessor key.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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

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