Monotouch: Adding controls (Views) to the first controller

gistfile1.cs

public class HomeViewController : UIViewController
{
    public override void ViewDidLoad()
	{
		Title = "Home";
		// A 'view' aka label control for this view
		UILabel label = new UILabel();
		label.Text = "HomeViewController";
		label.Frame = Center(100, 100);
		label.BackgroundColor = UIColor.LightGray;

		View.AddSubview(label);

		// 2 toolbar items
		UIBarButtonItem item1 = new UIBarButtonItem();
		item1.Title = "Click me";
		item1.Clicked += delegate(object sender, EventArgs e)
		{
			Level2ViewController controller = new Level2ViewController();
			NavigationController.PushViewController(controller, true);
		};

		UIBarButtonItem item2 = new UIBarButtonItem();
		item2.Title = "View with no back";
		item2.Clicked += delegate(object sender, EventArgs e)
		{
			ViewWithNoBackController controller = new ViewWithNoBackController();
			NavigationController.PushViewController(controller, true);
		};

		ToolbarItems = new UIBarButtonItem[] { item1, item2 };
		base.ViewDidLoad();
	}

	public override void ViewWillAppear(bool animated)
	{
		// Re-show the toolbar here for consistency
		NavigationController.SetToolbarHidden(false, true);
		base.ViewWillAppear(animated);
	}

	public RectangleF Center(float width, float height)
	{
		var rect = new RectangleF((View.Frame.Width / 2) - (width / 2), (View.Frame.Height / 2) - (height / 2), width, height);
		
		// Prints:
		// Rect: {X=110,Y=180,Width=100,Height=100}
		// Frame: {X=0,Y=20,Width=320,Height=460}
		Console.WriteLine("Rect: {0}", rect);
		Console.WriteLine("Frame: {0}", View.Frame);
		return rect;
	}
}