The NGen 2.0 Native Images Update Action updates any invalid images from the Native Images Cache.
Updating invalid images is required because if an assembly image is out of date, the Just In Time compiler will be invoked when an assembly references it (which negates the benefits of Native Images.)
Note: This action requires the Microsoft .NET 2.0 Framework.
For more information see http://msdn2.microsoft.com/en-us/library/6t9t5wcf(en-us,VS.80).aspx
Queue for execution...
Rather than being updated immediately, the updates will be queued for execution by the Native Image Service.