private static void AddInfoTextAdorner(PasswordBox passwordBox)
{
InfoTextAdorner adorner = null;
Action updateVisibility = () => adorner.UpdateVisibility(passwordBox.SecurePassword == null || passwordBox.SecurePassword.Length == 0);
RoutedEventHandler handler = delegate { updateVisibility(); };
Action disposeAction = () => passwordBox.PasswordChanged -= handler;
adorner = new InfoTextAdorner(passwordBox, disposeAction);
passwordBox.PasswordChanged += handler;
updateVisibility();
AddAdorner(passwordBox, adorner);
}
private static void AddInfoTextAdorner(TextBox textBox)
{
InfoTextAdorner adorner = null;
Action updateVisibility = () => adorner.UpdateVisibility(string.IsNullOrEmpty(textBox.Text));
TextChangedEventHandler handler = delegate { updateVisibility(); };
Action disposeAction = () => textBox.TextChanged -= handler;
adorner = new InfoTextAdorner(textBox, disposeAction);
textBox.TextChanged += handler;
updateVisibility();
AddAdorner(textBox, adorner);
}