For running the program, double click on ConsoleApp1.sln
I wrote all code in freeCodeCamp.org's C# Tutorials For Beginners video.
Youtube link: https://www.youtube.com/watch?v=GhQdlIFylQ8
Instructor Youtube channel link: https://www.youtube.com/c/GiraffeAcademy
His name is Mike Dane, he has a lot video about programming language.
I publish the repository for if you want check your code or don't want to write all code in video.
I divide all tutorials in regions at visualstudio.If you want to run code, select the code and do CRTL K + CTRL U (or just click the text undo botton).
I took some notes in comments block.You might want to look them.
If some classes have an error, copy the non-existing file (like Book.cs) in the ConsoleAPP1 folder on desktop or download folder.