visual studio 2017 access is denied exception from hresult 0x80070005 on typing Ctrl + . on a class to include Namespace

I'm getting visual studio 2017 version 15.6.6 Access is denied exception from hresult 0x80070005 on typing Ctrl + . on a class to add its Namespace and then Visual Studio restarts. Is there any workaround to fix it or is it an existing bug because it's very frequent?