private void button1_Click(object sender, EventArgs e) { AccountServiceClient asc = new AccountServiceClient(); int accountNumber = int.Parse(txtAccountNumber.Text); Account account = asc.GetAccount(accountNumber); if (account != null) { richTextBox1.Text = "account number: " + account.AccountNumber + "\n" + "current balance: " + account.Balance.ToString("c") + "\n" + "bank: " + account.Bank; } else { richTextBox1.Text = "No such account exists"; } }