WPF隐藏关闭？

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525"
        Visibility="Hidden">
    <!-- 窗口内容 -->
</Window>

this.Visibility = Visibility.Hidden;

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
       <Button Content="关闭" Click="Button_Click" />
    </Grid>
</Window>

private void Button_Click(object sender, RoutedEventArgs e)
{
    this.Close();
}