title: Using Interface Vs. Using "Using"
body: <p>I was reading this <a href="http://msdn.microsoft.com/en-us/library/87d83y5b(v=vs.80).aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/87d83y5b(v=vs.80).aspx</a> but I am wondering, what is the difference between or benefit of using interfaces as opposed to simply creating a class with properties and adding it to your class via "<code>using MyClass.cs</code>?"  It seems like either way you have to instantiate the method or property class...</p>
  
  <p>Thanks for your advice.</p>