title: UIViewController.View.Window is null in ViewDidLoad method
body: <p>Regardless on which controller type (<code>UIViewController</code>, <code>UITableViewController</code>), the following line always yields <code>null</code> in the <code>ViewDidLoad</code> method:</p>
  
  <pre><code>this.View.Window
  </code></pre>
  
  <p>Is this behavior normal, or am I doing something odd? What could lead to <code>UIViewController.View.Window</code> being <code>null</code>?</p>
  
  <p>(I suppose this question concerns not only MonoTouch, but also 'normal' Objective-C Cocoa).</p>
  
  <p>(MonoTouch 5.2.11, Xcode 4.2.1 4D502)</p>