title: Can't find RegistryKey-Class even when Microsoft.Win32 is used
body: <p>I'm currently working on a project in which I need to work with registry keys. As read in several tutorials, the namespace <code>Microsoft.Win32</code> offers a class called RegistryKey to work with the registry.</p>
  
  <p>My problem is that Visual Studio can't find the class although I imported the namespace using <code>using Microsoft.Win32;</code>.</p>
  
  <p>Normally I only type in just a few letters and I already get a suggestion for the class I'm searching for. But now Visual Studio doesn't even suggest the class.</p>
  
  <p>Did I forget anything? Are there other namespaces I need to use? 
  I'm using Visual Studio 2017 Enterprise - maybe it's because of that?</p>