title: Send an image rather than a link
body: <p>I'm using the Microsoft Bot Framework with Cognitive Services to generate images from a source image that the user uploads via the bot. I'm using C#.</p>
  
  <p>The Cognitive Services API returns a <code>byte[]</code> or a <code>Stream</code> representing the treated image.</p>
  
  <p>How can I send that image directly to my user? All the docs and samples seem to point to me having to host the image as a publically addressable URL and send a link. I can do this but I'd rather not.</p>
  
  <p>Does anyone know how to simple return the image, kind of like the Caption Bot does?</p>