Exit Android application if device is rooted: Xamarin.Forms | Xamarin.Android

MainActivity.cs

using Android.App;
using Android.Content.PM;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;
using Java.IO;
using Java.Lang;
using Process = Android.OS.Process;
using String = System.String;

namespace App1.Droid
{
    [Activity(Label = "App1", Icon = "@drawable/icon", Theme = "@style/MainTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
    public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
    {
        protected override void OnCreate(Bundle bundle)
        {
            TabLayoutResource = Resource.Layout.Tabbar;
            ToolbarResource = Resource.Layout.Toolbar;

            base.OnCreate(bundle);
            if (!RootUtil.IsDeviceRooted())
            {
                global::Xamarin.Forms.Forms.Init(this, bundle);
                LoadApplication(new App());
            }
            else
            {
                Toast.MakeText(ApplicationContext, "Not supported on Rooted Devices", ToastLength.Long).Show();
                FinishAffinity();
            }
        }
    }

    public class RootUtil
    {
        public static bool IsDeviceRooted()
        {
            return checkRootMethod1() || checkRootMethod2() || checkRootMethod3();
        }

        private static bool checkRootMethod1()
        {
            String buildTags = Android.OS.Build.Tags;
            return buildTags != null && buildTags.Contains("test-keys");
        }

        private static bool checkRootMethod2()
        {
            string[] paths = { "/system/app/Superuser.apk", "/sbin/su", "/system/bin/su", "/system/xbin/su", "/data/local/xbin/su", "/data/local/bin/su", "/system/sd/xbin/su",
                "/system/bin/failsafe/su", "/data/local/su", "/su/bin/su"};
            foreach (string path in paths)
            {
                if (new File(path).Exists()) return true;
            }
            return false;
        }

        private static bool checkRootMethod3()
        {
           Java.Lang.Process process = null;
            try
            {
                process = Runtime.GetRuntime().Exec(new string[] { "/system/xbin/which", "su" });
                BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(process.InputStream));
                if (bufferedReader.ReadLine() != null) return true;
                return false;
            }
            catch (Throwable t)
            {
                return false;
            }
            finally
            {
                if (process != null) process.Destroy();
            }
        }
    }
}