wont the same file be overwritten when the installer copies the files ?
here's my scenario..

I have file a.txt as a blank file being installed in the first msi. I
installed this blank file because I needed this file to be removed upon
uninstall and removeFile element wasnt working for me.

This a.txt file will be modified to contain some entries. I want to preserve
these entries when the upgrade installation happens. 

My question is, the upgrade installation also will contain a blank a.txt
because its a new installation for anyone who hasnt installed previous msi.
So I need to copy over the earlier a.txt AFTER the upgrade install is done.
Right  ? Otherwise wont it again replace the a.txt with the blank a.txt in
the upgrade installation ?





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