TabBar

    public SimpleTabBarController ()
		{
			Title = "Sample Tab Bar";
			EdgesForExtendedLayout = UIRectEdge.None;
			TabBar.Frame = new CGRect (0, 70, TabBar.Frame.Width, TabBar.Frame.Height);
			 
			tab1 = new UIViewController ();
			tab1.Title = "Green";
			tab1.View.BackgroundColor = UIColor.Green;
			tab2 = new UIViewController ();
			tab2.Title = "Orange";
			tab2.View.BackgroundColor = UIColor.Orange;
			tab3 = new UIViewController ();
			tab3.Title = "Red";
			tab3.View.BackgroundColor = UIColor.Red;

			var tabs = new UIViewController [] {
				tab1, tab2, tab3
			};
			ViewControllers = tabs;
			TabBar.ItemPositioning = UITabBarItemPositioning.Centered;
		}