I have BitmapImage:
BitmapImage image = new BitmapImage();
image.SetSource(memStream);
I want to save the image to the disk to see in the f
If your trying to take a ui element from your xaml and save it as an image your out of luck. In wpf there is a method on writable bitmap that takes a UIelement as a parameter but that isn't there in windows store apps.
You can use DirectX but this is a very complicated approach. Most of the drawing apps on the store use JavaScript as its much easier to do the save.