title: Service layer classes in ASP.NET MVC application best practices
body: <p>Can you provide a code sample with basic architecture guidlines for creating service layer classes (which supposed to be consumed by web front-ends, web api etc.)?</p>
  
  <p>Do you think this is a good tutorial? <a href="http://www.asp.net/mvc/tutorials/older-versions/models-(data)/validating-with-a-service-layer-cs" rel="nofollow">http://www.asp.net/mvc/tutorials/older-versions/models-(data)/validating-with-a-service-layer-cs</a></p>