title: Simplified Collection initialization
body: <p>While initializing WF4 activities we can do something like this:</p>
  
  <pre><code>Sequence s = new Sequence()
  {
      Activities = {
          new If() ...,
          new WriteLine() ...,
      }
  }
  </code></pre>
  
  <p>Note that <code>Sequence.Activities</code> is a <code>Collection&lt;Activity&gt;</code> but it can be initialized without the new <em>Collection()</em>.</p>
  
  <p>How can I emulate this behaviour on my <code>Collection&lt;T&gt;</code> properties?</p>