As you may already know, Silverlight 4 beta has been released and it has many new features. One of the most important features is net.tcp binding support. Now in Silverlight 4 we can communicate with WCF web service using net.tcp protocol. You may have noticed the many blog posts or articles that came out with a title similar to this : Silverlight 4 – WPF killer. If I can choose the one most important feature in Silverlight 4 beta that can kill WPF apps I will choose the net.tcp support.