Bypass protection in obfuscated DLL file
Some Unity games (Mono backend) are using weird protection in Assembly-Csharp.dll file. If you mod the dll, the game won’t load, causing game issues or crashes
After the developer moved to il2cpp, I can disclose how I bypassed protection
Assuming you are using dnSpy. Before saving DLL, preserve all MD Tokens then save
Preserving MD tokens and saving may cause error with some changes you made. If it happens, undo your changes and edit in IL as possible instead C#, until there is no errors during saving.
Using de4dot deobfuscation tool automatically preserve all MD Tokens