Where's the dump? I downloaded it and it just had a file in there that was 5gb and made on 7/13/2042. I don't know how but that's just what is in there for me.
It's c# that's just the framework it uses. But you can use dnspy to decompile the dll's, you can also use JetBrains dotpeek to decompile it into Visual Studio but that doesnt give you all of the code straight. I'd recommend just learning c# so that you can make your scripts.
Here's Shitwide Roleplays Main Discord copy. Woops Worldwide Roleplay*. There's no permissions on the channels so you'll have to go through and do them yourself. Enjoy!