title: missing system file System.Windows.Media what can i do?
body: <p>I'm trying to run a program that contains the line</p>
  
  <pre><code>using System.Windows.Media.Imaging;
  </code></pre>
  
  <p>but it give me this error </p>
  
  <p>Error   1   The type or namespace name 'Media' does not exist in the namespace 'System.Windows' (are you missing an assembly reference?)</p>
  
  <p>What can I do? Can I download it from somewhere?</p>