Passwords in WPF: How to find yours and how to prevent it being found

using System.Windows;

namespace SecureWpfLogOn
{
    /// <summary>
    /// Interaction logic for SecurePasswordBoxExample.xaml
    /// </summary>
    public partial class SecurePasswordBoxExample : Window
    {
        public SecurePasswordBoxExample()
        {
            InitializeComponent();
            securePasswordBox1.Text = "ciaobello";
        }

        private void btnLogin_Click(object sender, RoutedEventArgs e)
        {
            MessageBox.Show("You have inserted \"" + securePasswordBox1.Text + "\" password");
        }
    }
}