Updated Questions and Answers (markdown)

Questions-and-Answers.md

@@ -3,12 +3,12 @@
 See: https://github.com/SixLabors/ImageSharp/issues/418
 
 ## How do I convert a JPG to a PNG image?
-`
+```cs
     using (Image<Rgba32> image =Image.Load<Rgba32>($"{filename}.jpg"))
      {
        image.Save($"{filename}.png");
       }
-`
+```
 ImageSharp will automatically choose the encoding based on the file extension used in the filename (eg .jpg or .png)
 
 ## How do I convert an image to black and white?