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

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

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

		MainPage = new MainPage();
	}
	
	private void OnLocalNotificationTapped(LocalNotificationTappedEvent 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 void WillEnterForeground(UIApplication uiApplication)
        {
            Plugin.LocalNotification.NotificationCenter.ResetApplicationIconBadgeNumber(uiApplication);
        }
}