As I said yeserday, I have write the test suite for the Queue class. It's avaible at: http://webs.ono.com/rfp/QueueTest.cs The Queue class is at: http://webs.ono.com/rfp/Queue.cs Hope you find this useful. Greetings, Ricardo -- Ricardo Fernández Pascual ric@users.sourceforge.net Murcia. España.