title: Sample app not updating after code change and browser refresh? Build hangs Blazor
body: <p>Real excited to learn about Blazor. Lots of potential here with this framework!</p>
  
  <p>VS 2017 build 15.8.9 and VS extension for Blazor v 15.5.9 
  Ok, so I'm going through the demo app (todo) after starting a new project using the asp.net core (hosted) template. </p>
  
  <p>The first problem I'm running into is code changes not being reflected in the browser (edge, Firefox and Chrome).  However, if I stop the app (via visual studio) and try to start again, a build starts but just seems to go on and on.<br>
  If I stop the site via iis express in the system tray, stop the build, then re-launch, it builds fine and runs with the expected results of the code change reflected in the browser.  </p>
  
  <p>What can I check?</p>
  
  <p>Does the same thing when dropping down to command line and using <code>dotnet run</code> from the blazor_do.server folder</p>