http://blogs.msdn.com/johnwpowell/archive/2008/05/09/implementing-the-only-talk-to-friends-pattern-using-the-internalsvisibleto-attribute.aspxDid your parents ever tell you "don't talk to strangers?" They were trying to protect you, and even though you are all grown up now, that principle is still relevant--to the design of your software, that is. The basic idea is that classes should limiten-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.msdn.com/johnwpowell/archive/2008/05/09/implementing-the-only-talk-to-friends-pattern-using-the-internalsvisibleto-attribute.aspx#8480852Fri, 09 May 2008 19:35:36 GMT91d46819-8472-40ad-a661-2c78acb4018c:8480852Airline Travel &raquo; Implementing the &#8220;Only Talk to Friends&#8221; pattern using the InternalsVisibleTo Attribute<p>PingBack from <a rel="nofollow" target="_new" href="http://www.travel-hilarity.com/airline_travel/?p=4434">http://www.travel-hilarity.com/airline_travel/?p=4434</a></p>