WPF: reverting brush to default/original

Question

I\'m a complete newbie at WPF.

At the moment I\'m making a usercontrol for form elements called \"LabeledTextbox\" which contains a label, a textbox and a textblock for

Answer 1

Does this work? Setting it to black is better than using the ClearValue method

public string ErrorMessage
{
    set
    {
        if (string.IsNullOrEmpty(value))
        {
            _textbox.Background = Brushes.Black;
        }
        else
        {
            _textbox.Background = Brushes.Red;
        }

        _errorMessage.Text = value;
    }
}