Building Security Awareness in .NET Assemblies

I happened to actually look at a CodeProject e-mail today and found some articles by Chua Wen Ching on security in .NET assemblies. He has published 3 parts so far:

Part 1 - Learn to break a .NET Assembly

Part 2 - Learn to protect your .NET assemblies from being tampered

Part 3 - Learn to break Strong Name .NET Assemblies

I am eagerly awaiting part 4 to see what solutions he has. Obviously one that comes to mind is obfustication, but that isn't real security, its just a hurdle.