CONFUSEREXConfuserEx

ConfuserEx is a common .NET packer/protector used to obfuscate .NET assemblies and confuse the decompilation process. According to the official site: ConfuserEx is an free, open-source protector for .NET applications. It is the successor of Confuser project. ConfuserEx supports .NET Framework from 2.0 - 4.5 and Mono (and other .NET platforms if enough request!). It supports most of the protections you’ll find in commerical protectors, and some more!