How to create a builder?

Question

C++ / C#

How to create a builder for your program?
I already read a little, but I don’t understand, you need to shove all the code into .txt into resources
. And what about classes if there are a lot of them?

Answer 1

I think you want to compile your builds using code from text files (resources).
Compiling C# Code at Runtime .

Answer 2

I read how to work with classes if there are a lot of them?
Is it easy to transfer them to resources or do they also need to be translated into .txt format?
Do you need to put squiggles in the classes before the @ code?