private void LoginButton_Click(object sender, RoutedEventArgs e)
{
LoginRegistrationWindow loginWindow = new LoginRegistrationWindow();
loginWindow.Show();
}
/// <summary>
/// Sets the parent window for the current <see cref="RegistrationForm"/>.
/// </summary>
/// <param name="window">The window to use as the parent.</param>
public void SetParentWindow(LoginRegistrationWindow window)
{
this.parentWindow = window;
}