Obfuscation / Integer Masking library to encrypt numeric id to short string, generating a similar result to YouTube video id.
Example project in Unity3D to show how you should code and think if you want to obfuscate your c# code.
PandaObfuscator an simple Obfuscator, free, OpenSource for .Net Applications
An Obfuscator for .NET assembly
Open source obfuscation tool for .NET assemblies
.NET deobfuscator and unpacker.
naive and simple control flow obfuscation