How do static fields work in C#?

Question

.NET

Hello!
I've been learning C# for a long time, but I came across a question at an interview, the answer to which I can't find anywhere on the Internet at all

How do static variables work in C# and in .NET in general
What is the difference between const and readonly fields

How does it look at the compilation stage?

PS I only know that it has something to do with meta tables, but I have no idea at all.
Please give a clear answer
. Thank you very much in advance!

Answer 1

The constant is calculated statically at compile time. Constants are substituted as literals in places where these constants are used. If you create a separate assembly only for constants, refer to this assembly from the main project, build the project, then this assembly can be deleted and everything will work, since there will be no references to the classes of this assembly in the main project, all constants will be substituted as literals . Also, a change in an assembly with constants will require you to rebuild the assembly that uses the constants.
Here is a good example .
A readonly field is a read-only field that can be set in the constructor of the type in which it is defined or at the site of the field declaration. If a field is marked with the static modifier, then its value can only be set in the static constructor of the type in which it is defined or at the place of the field declaration.

Answer 2

Do you have dial-up internet or pathological laziness? :))
1. Values ​​of constants are applicable only at the assembly compilation stage.
2. Any static class fields are always available (of course, if visibility allows)
3. Any non-static class fields are available after creating an instance of the class https
://ru.stackoverflow.com/questions/651231/c-%D...
use of readonly fields in C#?
https://metanit.com/sharp/tutorial/3.3.php

Answer 3

const - constant immutable
readonly field - Readonly, value can only be assigned in the constructor