title: Separating Windows Forms and Classes C#
body: <p>I am looking for a way to design a C# application. I understand 3-tier model, but idk how to apply this in a good C# design.</p>
  
  <p>I have looked some asp.net mvc tutorials, but I am looking for a windows-form based tutorial.</p>
  
  <p>is there any book or website to learn a way to implement this?</p>