private async void addCredit_Click(object sender, RoutedEventArgs e)
{
MessageDialog CreditAccCreation = new MessageDialog($"Account ID: {AccountLogic.AddCreditAccount(customer)}", "Credit Account Created!");
await CreditAccCreation.ShowAsync();
}
private void addCredit_Click(object sender, RoutedEventArgs e)
{
AccountLogic.AddCreditAccount(customer);
}