Another way to get around reverse engineering code is where you place your dll's if you cannot really afford obfuscators which do add support. And in your assembies before deployment tell the compiler where to look for them which was an old practice to hinder reverse engineering.
But like it was already said, concentrate mostly on developing an excellent product and good coding practices, then you will be able to afford a nice obfuscator application in the future.
Also, try not to worry to much about others cracking your code because most hackers crack code just find a way to use the product without paying for it and not to steal code or to learn from for beginning programmer. Yeah, I wish JIT only supported c# and vb.net which would have really cut down on reverse engineering but since jit can read many due to .net being really language friendly that is the price.
So code away and make some money, buy some additional securities.
