Is there an extension for VS that allows you to view the source code of standard libraries by hotkey?

Question

C++ / C#

Hello. Sometimes, when I write on .NET Core, I look into the sources of some standard method on github. This is not always convenient. Is there some kind of extension for VS that would show me the code of standard methods by hotkey?
For example, I click on String.IsNullOrEmpty, press Alt + F12 and see the source code of the method in the selected area. Or am I asking too much?

Answer 1

Resharper