WPF: A TextBox that has an event that fires when the Enter Key is pressed

Question

Instead of attaching a PreviewKeyUp event with each TextBox in my app and checking if the pressed key was an Enter key and then do an action, I decided

Answer 1

    private void txtBarcode_KeyDown(object sender, KeyEventArgs e)
    {
        string etr = e.Key.ToString();

        if (etr == "Return")
        {
            MessageBox.Show("You Press Enter");
        }
    }