Is there an example of project development in C++ with explanations?

Question

C++ / C#

Good afternoon!
Please advise articles, courses, books on designing and writing good C++ code using the example of a large project with an explanation of how what should be done and why it should be done this way and not otherwise. If such exist at all. I did not find. Or something similar.

Answer 1

There are only general practices. Language has nothing to do with it.
And so - "Perfect code", for example ...

Answer 2

I can advise, pattern design, and see how people do it live, for example, on youtube or tvitch