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PermissionSet.AddPermissionImpl Method

Adds a specified permission to the PermissionSet.

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

protected virtual IPermission AddPermissionImpl(
	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, or null if perm is null.


The method is called from a ReadOnlyPermissionSet.

The AddPermissionImpl method is the implementation for the AddPermission method.

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.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4

.NET Framework Client Profile

Supported in: 4

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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