//
		// This method is invoked when the application has loaded and is ready to run. In this
		// method you should instantiate the window, load the UI into it and then make the window
		// visible.
		//
		// You have 17 seconds to return from this method, or iOS will terminate your application.
		//
		public override bool FinishedLaunching (UIApplication app, NSDictionary options)
		{
			// create a new window instance based on the screen size
			window = new UIWindow (UIScreen.MainScreen.Bounds);
			
			// load the appropriate UI, depending on whether the app is running on an iPhone or iPad
			if (UIDevice.CurrentDevice.UserInterfaceIdiom == UIUserInterfaceIdiom.Phone) {
				var controller = new RootViewController ();
				navigationController = new UINavigationController (controller);
				window.RootViewController = navigationController;
			} else {
				var masterViewController = new RootViewController ();
				var masterNavigationController = new UINavigationController (masterViewController);
				var detailViewController = new DetailViewController ();
				var detailNavigationController = new UINavigationController (detailViewController);

				masterViewController.DetailViewController = detailViewController;
				
				splitViewController = new UISplitViewController ();
				splitViewController.WeakDelegate = detailViewController;
				splitViewController.ViewControllers = new UIViewController[] {
					masterNavigationController,
					detailNavigationController
				};
				
				window.RootViewController = splitViewController;
			}

			// make the window visible
			window.MakeKeyAndVisible ();
			
			return true;
		}
			public DataSource (RootViewController controller)
			{
				this.controller = controller;
			}