What are some projects, plugin etc in asset store that will help me in increasing my c# coding skills ?

Questions & Answers
1

I really need to improve my C# coding skills what projects are there in unity that will help me in increasing my coding skill
I want to make my own PlayerPref manager for security of my game
I want to learn many of the classes , method, interface which are there in unity docs
so which project that are free in asset store, will help me ?

2

As @fafase said, that’s not the purpose of the asset store. It is, however, the purpose of the “Learn” section of this site. See, particularly: