private string DoImages(string text)
{
// First, handle reference-style labeled images: ![alt text][id]
text = _imagesRef.Replace(text, new MatchEvaluator(ImageReferenceEvaluator));
// Next, handle inline images: ![alt text](url "optional title")
// Don't forget: encode * and _
text = _imagesInline.Replace(text, new MatchEvaluator(ImageInlineEvaluator));
return text;
}