"SmartAssembly"
It means the executable has likely been obfuscated in some way and won't be very readable without unpacking or de-obfuscating it in some way.
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Redgate's .NET obfuscator
SmartAssembly is an obfuscator that helps protect your application against reverse-engineering or modification, by making it difficult for a third-party to access your source code.
If your entire business rests on the IP embodied in your software or you don't want your C# or VB.NET code exposed internationally, then obfuscating your code becomes a necessity, not a luxury.
With SmartAssembly, you get a comprehensive set of obfuscation features, including name mangling, control flow obfuscation, strings encoding, reference dynamic proxy, and declarative obfuscation.
