public override Dialog OnCreateDialog(Bundle savedInstanceState)
        {
            _fingerprintAuthenticator = new FingerprintAuthenticator(Activity, this);

            View v = Activity.LayoutInflater.Inflate(Resource.Layout.fingerprintdialog, null);

            _fingerprintStatus    = v.FindViewById <TextView>(Resource.Id.fingerprint_status);
            _imgFingerprintStatus = v.FindViewById <ImageView>(Resource.Id.img_fingerprint_status);

            var dialog = new AlertDialog.Builder(Activity)

                         .SetCancelable(false)
                         .SetTitle("Sign in")
                         .SetNegativeButton("Cancel", (sender, e) => Dismiss())
                         .SetView(v)
                         .Create();

            dialog.SetCanceledOnTouchOutside(false);

            return(dialog);
        }