In my product I need support functionallity of downgrading. For example,
after release of the version 2.0.5 and version 2.1.0 and after installing
2.1.0 user can install 2.0.5 and it installs correctly. But how to implement
this without bootstrapping, using only MSI functionality?
If I use major upgrade and RemoveExistingProducts it leave newer versions of
the files (for assemblies - due to version check, for other - modify date)
- if RemoveExistingProducts after InstallFinalize or little earlier. If
RemoveExistingProducts is before InstallInitialize, it removes files
entirely - because it uninstall them, but then not install, it was newer
versions of them...
Only way is to remove right after FindRelatedProducts but then we lost
Rollback functionality (if we cancel downgrade process - newer product will
not remain).
Of course there is way - minor upgrade and REINSTALL, but it also has some
limitations, or no?
Can anyone help me to find better way?
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