In this chapter, you learned how to apply the principles of service orientation to the back-end services application that will serve as the core application server for the AJAX application. You also looked at WebScriptingBehavior and how to enable JavaScript support through configuration. Finally, you saw how to enable JavaScript support in legacy ASP.NET 2.0 ASMX services through System.Web.Extensions and the attributes ScriptService and ScriptMethod. By now you should understand the basics of WCF programming and be able to integrate a simple service library hosted in ASP.NET. In the next chapter we’ll build on this foundation and look at additional Web service programming techniques using WCF’s Web programming model.