PermissionSet.RemovePermission(Type) Method

Definition

Namespace:

System.Security

Assembly:

System.Runtime.dll

Source:

PermissionSet.cs

Removes a permission of a certain type from the set.

public:
 System::Security::IPermission ^ RemovePermission(Type ^ permClass);

public System.Security.IPermission? RemovePermission (Type? permClass);

member this.RemovePermission : Type -> System.Security.IPermission

Public Function RemovePermission (permClass As Type) As IPermission

Parameters

permClass

Type

The type of permission to delete.

Returns

IPermission

The permission removed from the set.

Exceptions

InvalidOperationException

The method is called from a ReadOnlyPermissionSet.

Examples

The following code example shows the use of the RemovePermission method to remove a FileIOPermission from a permission set. This code example is part of a larger example provided for the PermissionSet class.

// Remove FileIOPermission from the permission set.
ps5->RemovePermission( FileIOPermission::typeid );
Console::WriteLine( "The last permission set after removing FileIOPermission = {0}", ps5 );

// Remove FileIOPermission from the permission set.
ps5.RemovePermission(typeof(FileIOPermission));
Console.WriteLine("The last permission set after removing FileIOPermission = "
    + ps5.ToString());

' Remove FileIOPermission from the permission set.
ps5.RemovePermission(GetType(FileIOPermission))
Console.WriteLine("The last permission set after removing FileIOPermission = " & ps5.ToString())

Remarks

Important

You cannot remove permissions from an unrestricted permission set. The permission set remains unrestricted after you attempt to remove the permission, and an exception is not thrown.

The following C# code attempts to remove the FileIOPermission from the FullTrust permission set, but the permission is not removed.

PolicyLevel myPol = PolicyLevel.CreateAppDomainLevel();  
PermissionSet myPermSet = myPol.GetNamedPermissionSet("FullTrust");  
myPermSet.RemovePermission(typeof(FileIOPermission));  

Notes to Inheritors

When you inherit from PermissionSet, you can change the behavior of the RemovePermission(Type) method by overriding the RemovePermissionImpl(Type) method.