private async void Button_Clicked_1(object sender, EventArgs e) { getBalance gettokenbalance = new getBalance(); var asd = await gettokenbalance.GetBalance(walled_adress.Text); if (asd == null) { await DisplayAlert("Get Balance Failed", "Get balance function is failed please try again or check your wallet adress", "OK"); } else { await DisplayAlert("Get Balance Success", "Get balanc is succes please check your balance again.", "OK"); wallet_amount.Text = asd + " PostanteToken"; } }