title: Push data server to client web app, how to?
body: <p>(Regarding Web apps, asp.net 5)</p>
  
  <p>I'm new to this stuff, i want to push data from the server to the client. Displaying 'real-time' data on a website. (something like a chat window).</p>
  
  <p>How should i realize this? I've read about SingalR, but most information seems to be outdated? Is this still a good choice?</p>
  
  <p>For example, one of the problems i run into is when i try to add this:
  app.MapSignalR();
  to my startup.cs</p>
  
  <p>Error   CS1061  'IApplicationBuilder' does not contain a definition for 'MapSignalR' and no extension method 'MapSignalR' accepting a first argument of type 'IApplicationBuilder' could be found</p>
  
  <p>Can someone point me in the right direction?</p>