On any new solution, the CodeAnnotationsCache XML component writes its settings, even if they're default, to the solution-shared settings file.

STR: create new solution, R# Options, OK.

I'm not sure if this is the expected behavior, or if we should rather keep low until the settings file is really needed.

  <CodeAnnotations>
    <Namespace>JetBrains.Annotations</Namespace>
    <DefaultNamespace>JetBrains.Annotations</DefaultNamespace>
  </CodeAnnotations>

Issue was closed