title: cannot get visual studio connected to mac
body: <p>I've tried to get Visual Studio 2019 (Community Edition) working with a Mac to create a Mobile app iOS and Android. Unfortunatly I'm struggling the whole day wit this combination.</p>
  
  <p>My current issue, which I cannot solve myself is the following error in Visual Studio on Windows:</p>
  
  <pre><code>An unexpected error occurred while checking the SSH configuration of '192.168.178.74'
  An item with the same key has already been added.
  </code></pre>
  
  <p>I tried to change the MAc Address of the virtual machin to get a new IP Adress, without success</p>
  
  <p>my setup:</p>
  
  <ul>
  <li>Visual Studio 2019 Comunity with Xamarin </li>
  <li>Mac OS Catalina in VM Ware on same machine than Windows 10</li>
  <li>XCode 11.3.1</li>
  <li>Visual Studio for Mac Community 8.4.8 (build 2)</li>
  </ul>
  
  <p>Btw. I forgot to mention, that it is possible to log in to the Mac via ssh from Windows.</p>