protected void LoadAvailbleCurrenciesButton_Click(object sender, EventArgs e) { CurrencyConverterService.Service1Client currencyConverterClinet = new CurrencyConverterService.Service1Client(); LoadAvailableCurrenciesTextBox.Enabled = true; LoadAvailableCurrenciesTextBox.Text = currencyConverterClinet.getCurrencyCodes(); //LoadAvailableCurrenciesTextBox.Text = "hello"; LoadAvailableCurrenciesTextBox.Enabled = false; }