If your project only need to document public members. Please use this same product but only enabled to public members. Please click here VsMarketplace. If you already installed this product, please uninstall it firstly.
After you installed it to your Visual Studio.
Then you can click the bulb to see fix option. When you click the option, the documentation will be added.
You can use shortcut(Alt+Enter or Ctrl+.) to quickly add the documentation.
It can help you generate general documentation according to the member identifier.