.NET decompilation, how easy is it?

Question

I was looking into the best encryption for a license key for an application, and someone said that someone can easily decompile the application and then just skip the test f

Answer 1

Try opening your application with Reflector. You will probably be surprised :-)

And once a cracker has located the right location in your code, they can use a combination of ildasm/ilasm to remove the check from your application - even if the code Reflector generates won't compile.