title: VS2017 - StartUp project with dependent projects fails unless all projects start first
body: <p>I have 3 projects in my solution:</p>
  
  <ol>
  <li>Console App (Client)</li>
  <li>IdentityServer</li>
  <li>Web API (asp.net core 2.2)</li>
  </ol>
  
  <p>StartUp Project:  Console App (Client)
  Dependent Projects:  IdentityServer and Web API</p>
  
  <p>Error received when I hit Ctrl-F5:
  "No connection could be made because the target machine actively refused it"</p>
  
  <p>However, this error no longer appears and the above set-up works fine if I first run all 3 as "Multiple StartUp Projects".</p>
  
  <p>Why does VS2017 work this way?  Or is this symptomatic of a configuration I am overlooking?</p>
  
  <p>Any insight would be appreciated.</p>