This post discusses the new features in WCF 4.5. There have been significant improvements in WCF 4.5 on configuration. Simplifying the generated configuration file in client A client configuration file is generated when you add a service reference in Visual Studio 2010. The configuration files in earlier version of WCF contained the value of every binding property even if it is a default value. In WCF 4.5 Configuration files contain binding properties that are set to non-default value.