public static void InitLeftButton(this UIViewController c)
{
var button = UIButton.FromType(UIButtonType.Custom);
button.Frame = new RectangleF(0, 0, 32, 32);
button.SetBackgroundImage(UIImage.FromFile("three-line-menu.png"), UIControlState.Normal);
button.TouchUpInside += delegate {
Deck.OpenLeftView(true);
};
c.NavigationItem.LeftBarButtonItem = new UIBarButtonItem(button);
}
