.net code security

I know this is an old topic, but I can't believe how difficult it is to
secure a .net winform application. I was looking at building a sample app on
my own just as a proof of concept.  Has this gotten any easier/more secure
with .net 2.0 or anything?  Even with tools that obfuscate your code,
encrypt it, etc. encrypted code still gets decrypted as it's pushed to the
JITTER in chunks. Then using strong naming and the built in Code Access
Security attributes I have been told that the user can simply disable .net
security in the .net configuration section of control panel (or something
like that). How does anyone deploy a .net application to production (public
use) that has any sort of confidential logic inside of it?

I know this is not the winform group, but I have tried a few times to
register and it never works.  I would appreciate any responses.

Thanks.

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