protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);

            // Set our view from the "main" layout resource
            SetContentView(Resource.Layout.navigation_activity);

            AndroidX.AppCompat.Widget.Toolbar toolbar = FindViewById <AndroidX.AppCompat.Widget.Toolbar>(Resource.Id.toolbar);
            SetSupportActionBar(toolbar);

            NavHostFragment host          = SupportFragmentManager.FindFragmentById(Resource.Id.my_nav_host_fragment) as NavHostFragment;
            NavController   navController = host.NavController;

            int[] topLevelDestinationIds = new int[] { Resource.Id.home_dest };
            appBarConfiguration = new AppBarConfiguration.Builder(topLevelDestinationIds).SetDrawerLayout(FindViewById <DrawerLayout>(Resource.Id.drawer_layout)).Build();

            SetupActionBar(navController, appBarConfiguration);
            SetupNavigationMenu(navController);
            SetupBottomNavMenu(navController);

            navController.AddOnDestinationChangedListener(this);
        }