LoGiC.NET is a free and open-source .NET obfuscator that uses dnlib for folks that want to see how obfuscation works with more complex obfuscations than Goldfuscator for example.
Before Obfuscation

After Obfuscation

Dependencies
dnlib v3.3.2 : Restore NuGet packages and it’ll work (if it doesn’t already).
SharpConfigParser : https://github.com/AnErrupTion/LoGiC.NET/raw/master/SharpConfigParser.dll
- Renames methods, parameters, properties, fields and events.
- Adds proxy calls.
- Encrypts strings.
- Encodes ints.
- Adds junk methods.
- Prevents application tampering.
- Adds control flow.
- And more!