title: change html relative image paths to absolute in httpmodule
body: <p>I have set up a .net http module to capture the html output of a page. I am looking to finding the quickest way to do the following:</p>
  
  <p>Search through all the images (ie. img tags and input controls of type image)
  Find those that have a relative source path
  Manipulate the path by converting it from relative to absolute (I pass the absolute path to it)
  Update the html source
  Output the manipulated html source to users browser</p>
  
  <p>Any suggestions as to the best way and more performant way of doing this? I am developing in c#.</p>