var notification = new NotificationRequest
{
    NotificationId = 100,
    Title = "Test",
    Description = "Test Description",
    ReturningData = "Dummy data", // Returning data when tapped on notification.
    Schedule = 
    {
        NotifyTime = DateTime.Now.AddSeconds(30) // Used for Scheduling local notification, if not specified notification will show immediately.
    }
};
await NotificationCenter.Current.Show(notification);

await NotificationCenter.Current.Show((notification) => notification
                        .NotifyAt(DateTime.Now.AddSeconds(30)) // Used for Scheduling local notification, if not specified notification will show immediately.
                        .WithTitle("Test Title")
                        .WithDescription("Test Description")
                        .WithReturningData("Dummy Data") // Returning data when tapped on notification.
                        .WithNotificationId(100)
                        .Create());

await NotificationCenter.Current.Show((notification) => notification
                    .WithScheduleOptions((schedule) => schedule
					.NotifyAt(DateTime.Now.AddSeconds(30))
					.Build())
                    .WithAndroidOptions((android) => android
                         .WithAutoCancel(true)
                         .WithChannelId("General")
                         .WithPriority(NotificationPriority.High)
                         .WithOngoingStatus(true)
                         .Build())
                    .WithiOSOptions((ios) => ios
                        .WithForegroundAlertStatus(true)
                        .WithForegroundSoundStatus(true)
                        .Build())
                    .WithReturningData("Dummy Data")
                    .WithTitle("Test Title")
                    .WithDescription("Test Description")
                    .WithNotificationId(100)
                    .Create());

public partial class App : Application
{
	public App()
	{
		InitializeComponent();

		// Local Notification tap event listener
		NotificationCenter.Current.NotificationTapped += OnLocalNotificationTapped;

		MainPage = new MainPage();
	}
	
	private void OnLocalNotificationTapped(NotificationEventArgs e)
    	{
		// your code goes here
	}
}

public partial class App : Application
{
	public App()
	{
		InitializeComponent();

		// Local Notification received event listener
		NotificationCenter.Current.NotificationReceived += OnLocalNotificationReceived;

		MainPage = new MainPage();
	}
	
	private void OnLocalNotificationReceived(NotificationEventArgs e)
    	{
		// your code goes here
	}
}

public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
{
	protected override void OnCreate(Bundle savedInstanceState)
	{
	    	.....
	    	// Must create a Notification Channel when API >= 26
        	// you can created multiple Notification Channels with different names.
        	NotificationCenter.CreateNotificationChannel();		
		.....		
		LoadApplication(new App());
		.....	
		NotificationCenter.NotifyNotificationTapped(Intent);
	}

	protected override void OnNewIntent(Intent intent)
	{
		NotificationCenter.NotifyNotificationTapped(intent);
		base.OnNewIntent(intent);
	}
}

public partial class AppDelegate : global::Xamarin.Forms.Platform.iOS.FormsApplicationDelegate
{        
        public override bool FinishedLaunching(UIApplication app, NSDictionary options)
        {
            global::Xamarin.Forms.Forms.Init();

            // Ask the user for permission to show notifications on iOS 10.0+ at startup.
            // If not asked at startup, user will be asked when showing the first notification.
            Plugin.LocalNotification.NotificationCenter.AskPermission();

            LoadApplication(new App());

            return base.FinishedLaunching(app, options);
        }

	public override void WillEnterForeground(UIApplication uiApplication)
        {
            Plugin.LocalNotification.NotificationCenter.ResetApplicationIconBadgeNumber(uiApplication);
        }
}