title: Where does business logic sit in MVVM?
body: <p>I am used to developing with N-Tier architecture, i.e. Data Access Layer, Business Logic Layer, etc</p>
  
  <p>Can anyone provide any advice or links about the best location for my business logic?</p>
  
  <p>Do I put all of this into classes within the Models folder of my Silverlight application?</p>
  
  <p>Paul</p>