title: Design Pattern for Task Notification System
body: <p>I am looking a good design pattern that takes a combination of a Observer Design Pattern and Command Design Pattern.</p>
  
  <p>Observer Design Pattern:</p>
  
  <ul>
  <li>Subject - ISystem  </li>
  <li>ConcreteSubject - "Different Types of Systems"</li>
  <li>Observer - INotifier</li>
  <li>ConcreteObserver - "Different Types of Notifier's"</li>
  </ul>
  
  <p>Command Design Pattern: Used to create a task. "Different Types of Task"</p>
  
  <p>If anyone know of any good resource I can use or have done something related to what I am looking for please share? </p>