How to edit Assembly-Csharp

Hello.

I was just wondering how the hack from Kunii is made.
He edited the Assembly-Csharp in some way, but how do i do that?

Any help or resources?

iirc, it's patched

when the game updates you have to do it all over again

Hack is fixed not working..

.Net Resolver and the plugin reflexil. You dont fix the Unicode symbols because that's not what you're editing...