When WCF started, the focus was on decoupling. That was a basic SOA tenet, and Microsoft, though it was not that big a singer in the SOA choir, took those principles to heart in formulating .NET design patterns. Of course, the REST dialect of SOA has gained traction. REST can’t exactly be called “decoupled” because it is so much about HTTP. In a recent article on SearchSOA.com, we look at updates to WCF, but there is consideration of ASP.NET’s Web API for REST as well.