void Signup_button_Click(object sender, EventArgs e)
 {
     ResponseEntity retur = new SignedCageballEventViewModel().SignUpForCageballEvent(id, signUp);
     Android.Widget.TextView signup_label = FindViewById<TextView>(Resource.Id.signed_text);
     signup_label.Text = retur.Description;
     signup_button.Enabled = retur.Error;
 }
        private void SignupBtnClick(object sender, RoutedEventArgs e)
        {
            var cageballService = new SignedCageballEventViewModel();

            ResponseEntity retur = cageballService.SignUpForCageballEvent(_id,_signUp);
              responseTxt.Text = retur.Description;
              SignupBtn.IsEnabled = retur.Error;

        }