MediaPermission.Union Method (IPermission)
Creates a permission that is the union of the current permission and the specified permission.
Assembly: WindowsBase (in WindowsBase.dll)
A permission to combine with the current permission. It must be of the same type as the current permission.
Return ValueType: System.Security.IPermission
A new permission that represents the union of the current permission and the specified permission.
Available since 3.0