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PermissionSet.RemovePermission Method

Removes a permission of a certain type from the set.

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

public IPermission RemovePermission(
	Type permClass


Type: System.Type
The type of permission to delete.

Return Value

Type: System.Security.IPermission
The permission removed from the set.


The method is called from a ReadOnlyPermissionSet.

Important noteImportant

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");

Notes to Inheritors

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

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.
Console.WriteLine("The last permission set after removing FileIOPermission = "
    + ps5.ToString());

.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.