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PermissionSet.AddPermission Method

Adds a specified permission to the PermissionSet.

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

public IPermission AddPermission(
	IPermission perm


Type: System.Security.IPermission
The permission to add.

Return Value

Type: System.Security.IPermission
The union of the permission added and any permission of the same type that already exists in the PermissionSet.


The method is called from a ReadOnlyPermissionSet.

If a permission of the same type as the added permission already exists in the PermissionSet, the new permission is the union of the existing permission object and the specified permission object. For example, if a permission that implements IUnrestrictedPermission is added to an Unrestricted PermissionSet, the resulting union is the original Unrestricted PermissionSet.

Notes to Inheritors

When you inherit from PermissionSet, you can change the behavior of the AddPermission method by overriding the AddPermissionImpl method.

The following code example shows the use of the AddPermission method to add a permission to a permission set. This code example is part of a larger example provided for the PermissionSet class.

// Add a permission to the permission set.
    new FileDialogPermission(FileDialogPermissionAccess.Open));

.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.