some sample MT setup code

test.cs

// This method is invoked when the application has loaded its UI and its ready to run
		public override bool FinishedLaunching (UIApplication app, NSDictionary options)
		{
			
			
			
			UIApplication.SharedApplication.StatusBarStyle = UIStatusBarStyle.BlackOpaque;
			tabBar = new UITabBarController();
			MainView = tabBar.View;
			window.AddSubview(MainView);
			
			
			near = new NearDialogViewController();
			map = new MapViewController();
			tripLog = new TripLogViewController();
			infoPage = new InfoViewController();
			
			
			timer = new TimerViewController{
					TabBarItem = new UITabBarItem("Timer", Resources.Timer, 1)
				};
			
			tabControllers = new UIViewController[] {
			
				new UINavigationController(near) {
					TabBarItem = new UITabBarItem("Near", Resources.Near, 0)
				},
				new UINavigationController(map) {
					TabBarItem = new UITabBarItem("Map", Resources.Map, 2)
				},
				timer,
				new UINavigationController(tripLog) {
					TabBarItem = new UITabBarItem("Trip Log", Resources.TripLog, 3)
				},
				new UINavigationController(infoPage) {
					TabBarItem = new UITabBarItem("Info", Resources.Info, 4)
				}
			};
			
			
			tabBar.SetViewControllers(tabControllers, false);
			
			
			window.MakeKeyAndVisible ();
			
		
			
			return true;
		}

// and also this , which is called by the same method above (eventually)

public void BuildPhoneUI()
		{
			UIApplication.SharedApplication.StatusBarStyle = UIStatusBarStyle.BlackOpaque;
			
			
			
			tabBar = new UITabBarController();
			tabBar.ViewControllerSelected += delegate(object sender, UITabBarSelectionEventArgs e) {
				
			};
			
			MainView = tabBar.View;
			
			
			home = new HomeDialogViewController();
			contacts = new ContactsDialogViewController();
			projects = new ProjectsDialogViewController();
			
			mileage = new MileageDialogViewController();
			
			info = new InfoViewController();
			
			DataSource.Instance.RegisterViewControllers(home, contacts, projects); 
			
			tabControllers = new UINavigationController[] {
			
				new UINavigationController(home) {
					TabBarItem = new UITabBarItem("Home", StockImages.Home, 0)
				},
				new UINavigationController(projects) {
					TabBarItem = new UITabBarItem("Projects", StockImages.Project, 2)
				},

				new UINavigationController(contacts) {
					TabBarItem = new UITabBarItem("Contacts", StockImages.Users, 4)
				},
				new UINavigationController(mileage) {
					TabBarItem = new UITabBarItem("Mileage", StockImages.GasPump, 5)
				},
				new UINavigationController(info) {
					TabBarItem = new UITabBarItem("Info", StockImages.Info, 6)
				}
				
			};
			
			
			tabBar.SetViewControllers(tabControllers, false);
			
			tabBar.ViewControllerSelected += delegate(object sender, UITabBarSelectionEventArgs e) {
				
				if (e.ViewController.TabBarItem.Title == "Home")
				{
					home.RefreshFromDatastore();
					home.NavigationController.PopToViewController(home.NavigationController.ViewControllers[0], false);
				}
			};
			window.AddSubview(MainView);
			
		}