HELP EDITING C-SHARP FILES. I WANT TO LEARN

I really need help with this soon. I want to know how to edit C-Sharp files. I know that .net Reflector can open them but in there, I cannot seem to find what I want and I cannot edit it. Are there any other programs out there that can open C-Sharp files? The one in particular is the Assembly C-Sharp to 7 days to die. It is a .dll file so I dont know if that plays a role in this. If someone could point me in the right direction that would be great.

The reason why I want to know how to edit this file is to give myself creative in servers along with 1 hit and blocks are destroyed. I know I am a noob, but please just help.

If you look up the 7 days to die 8.8 hack, and look at all the stuff is included, I want to know where to find that and change it.

If you want learn how to do cheats on C-Sharp, just learn programming language C-Sharp.
P.S.
Before learning C-Sharp, you may learn C++, for better understanding.