title: SaaS, SOA and Web Services
body: <p>This question may be foolish, but I am really confused.</p>
  
  <p>I want to implement a Software as a Service (SaaS), and I thought that I can use Visual Studio and WCF to do it. But I've read that WCF and Web Services are a SOA implementation and not a SaaS.</p>
  
  <p>Can I use WCF to implement a SaaS? What's the relation between SaaS, SOA and Web Services? </p>