protected override void OnCreate(Bundle bundle)
{
AndroidEnvironment.UnhandledExceptionRaiser += OnUnhandledEception;
TaskScheduler.UnobservedTaskException += OnUnhandledTaskException;
base.OnCreate(bundle);
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.Main);
Hub.Navigator = new AndroidNavigator(this);
var vm = new TimesheetsViewModel(Hub.ApiClient, Hub.Navigator);
ListView.Bind(this, vm.Timesheets, t => t.Name);
ListView.BindItemSelected(vm.Timesheets, vm.TimesheetSelectedCommand);
FindViewById <Button>(Resource.Id.refreshItems).Bind(vm.Timesheets.RefreshCommand);
//Initiate the OAuth2 authentication process:
var authenticator = new Xamarin.Auth.WindowsAzureOAuth2Authenticator(
"https://login.windows.net/<your tenant id>",
"<client app id>",
"<api / resource uri>",
new Uri("<client redirect uri>"));
authenticator.Completed += AuthenticatorOnCompleted;
var activity = authenticator.GetUI(this);
StartActivity(activity);
}