Setup Deployment Project - Upgrade Issue

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C#

installer

I have a simple C#.net application that I have created a setup project for.The application is a single exe and uses an app.config fil.

My question is, how do I go about upgrading the application whenever I make any updates to my code?

Within the setup project, I see I can set the installer to automatically remove the old version, but I don't really want to do that since it may overlay my custom settings in my app.config.

I really want to be able to create a setup project that will simply update the binary content of my application and keep my app.config settings. I also don't want to have do uninstall first.

I guess I'm looking for something similar to install shield's 'upgrade' option.

I've been playing with several settings and have more than confused myself...How can I accomplish this?

I performed the following, but still no success:

VS recommended I change the Product id/GUID whenever I increased the version (from my setup project). When I changed the version and guiid, it did add another entry to the add/remove programs.

I tried simply changing the assembly version on my exe, then rebuilding the setup package without modifying the version and guid within the setup project and when I went to do an install I got the "setup detected a previous version of this product....you must first uninstall..." message.

Many thanks in advance.
Kind regards,