CryptoObfuscator Delegate Restore restore Delegates for CryptoObfuscator last version since I've noticed that de4dot-2.0.2 don't suport it! Before that get ride of control flow obfuscation using de4dot-2.0.2 Use de4dot.exe filename -p un (to force to packer unknow) CryptoObfuscatorDelegateRestore.exe.config.zip if in the case you have Framework 4.0! Test it and let me know if works!