[wix-users] WiX installed side-by-side

[Colin Sim]

I see that in-order to support building with different versions of WiX we have to do commit the WiX binaries into our own source control as documented <a href="http://wixtoolset.org/documentation/manual/v3/msbuild/daily_builds.html">here</a>.

I don't think this is a particularly nice solution (for the same reason why we don't commit MSBuild tools or Visual Studio into our source control). Is there a reason why there isn't a different Upgrade Code for each version of the WiX installer? I guess that's all that's required to avoid removing the previous product.

The installed directory changes for each version (e.g. "C:\Program Files (x86)\WiX Toolset v3.10" for WiX 3.10 and "C:\Program Files (x86)\WiX Toolset v3.11" for WiX 3.11), which suggests to me that 3.10 and 3.11 are different products. Otherwise why isn't the WiX content installed into the same directory? Each release in the 3.x version should be backward compatible, that way using a newer version of WiX for as an example our trunk, wouldn't need us to upgrade WiX for all our past branches.

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