If your current project is closed-source, you probably have good reasons for that choice. Whether your company's future depends on the success of your next software product, or you're simply trying to protect your licensing scheme, or you're hoping to thwart competitors from seeing your secrets, protecting your code is a real problem. Let's discuss some simple active steps to protect your program. This BoF will explore ways to protect your .NET application from reverse engineering and simple steps you can make to make it more secure.