Windows phone screenshot 截图 代码

看了Alexis的文章，http://www.cnblogs.com/alexis/archive/2011/06/01/2067220.html，

关于windows phone屏幕截图的，

试了一下，屏幕翻转在landscape的状态下，截图貌似有问题，

于是google了一下，

发现如下代码：(http://blog.markarteaga.com/ScreenCaptureOnWindowsPhone7.aspx)

private void btnCaptureScreen_Click(object sender, RoutedEventArgs e)
{
    //Capture the screen and set it to the internal picture box
    WriteableBitmap bmp = new WriteableBitmap((int)this.ActualWidth, (int)this.ActualHeight);
    bmp.Render(this, null);
    bmp.Invalidate();
    //this.image1.Source = bmp;
    
    //Set a new background
    //ImageBrush brush = new ImageBrush();
    //brush.ImageSource = new BitmapImage(new Uri(NextImage,UriKind.Relative));
    //ContentGrid.Background = brush;
    
}

经尝试，可成功截图。