Thanks. I had the same problem for Microsoft.Practices.Prism.Interactivity.dll
Having installed Windows 8 Pro, Visual Studio 2012 Premium and the new Windows Phone 8 SDK, I was keen to make sure that my Windows Phone 7.1 project still built & worked. That meant getting all of the references to work again.
Most of the references were for packages that I could install through Nuget. However, one was for a Zip file that I had to download and unpack. Upon browsing to the appropriate DLL and selecting it as the reference, Visual Studio promptly reported:
A reference to a higher version or incompatible assembly cannot be added to the project
The ultimate solution was to right-click on each of the files that had been contained in the Zip file, choosing Properties and then clicking on the Unblock button. Once that was all done, Visual Studio then allowed me to add the reference, although it did warn me that it might…
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