How to practice after learning the material on c#? How to determine which part of c# to learn for unity?

Question

IT education

I am just starting to learn c# for Unity. I started reading the book "The C# 7 Programming Language and the .NET and .NET Core Platforms". But there, as far as I understand, there is no practical remote sensing. Therefore, the question is, how to practice, if I am an absolute beginner and cannot do whole programs to consolidate, then what does the book give at the beginning?
+ Second question. What material do I need to study? I don't need the whole c#, but only the part that is used in unity. How to recognize what is needed for unity and what is not?

Answer 1

Just like regular C#. Schoolunit is only 1% of everything C# has, learn it, then learn Unity.
And practice is a simple matter, write me a program that will take a bunch of vidos from a folder, play them to me sequentially with the ability to quickly switch through the playlist and by pressing a button (it doesn’t matter on the keyboard or form) copy the current vidos to a pre-selected directory.
A hundred times I asked to write, yet not a single Aspirant has done it.