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Xamarin Studio (Mac / OS X): Solution file (iOS) can no longer be loaded / opened

I recently tried to open the solution file (.sln) of my iOS-App and noticed it no longer works with Xamarin Studio.

The error message: Cannot cast from source type to destination type.

I've been using MSVC 2010 for app developement recently, so I guess this is another example of incompatibilities between Xamarin Studio and MSVC (I'm already used to messed-up "ItemGroups" in the .csproj files, but this seems to be something different).

The version of Xamarin Studio is 5.9.8 (build 0).

Maybe I should also file a bug at Xamarin.

Screenshot

Solution

  • Deleting the .userprefs file solved the problem.

    Details: The root element contained a strange value for "DisabledProjects":

    <Properties DisabledProjects="&#xA;  ">

    Xamarin Studio failed to load that expression. Don't know where that came from though.