title: ASP.NET MVC 5 AJAX - Update chat room when local & remote users post
body: <p>I need to create a simple chat room in ASP.NET MVC 5.</p>
  
  <p>Creating models, view models &amp; using an AJAX ActionLink I can let one user post new data to a partially updated area of the page easily. I have found plenty of examples of this online.</p>
  
  <p>However, I also need to update the 'chat / message window' when the external user sends a message too. How can I send these events to the client - and how can I update the chat by only adding what the external user said (not refreshing all the text of the chat)?</p>
  
  <p>thx.</p>