This chapter has introduced you to WCF. You have learned the purpose of WCF and seen how to use it to create a simple Web service by adopting a contract-first approach to design. You have deployed the WCF Web service to IIS and seen how to create a client application that can access the service. Finally, you have learned the basic principles of SOA and should understand that using WCF can help you to build services for an SOA quickly and easily.