MissingMethodException when using zxing.Monotouch on iOS6

Question

I have updated my development system to the new MonoTouch (6.0.1) and now whenever I'm referencing zxing.Monotouch types I get MissingMethodException on the constructor. System.MissingMethodException: Method not found: 'MyClass..ctor'. It's been 3 days now... Anyone got any idea? I'm even willing to give up zxing if that what it takes (even though it's a wonderful library).

Edit

When I include zxing.Monotouch in the solution and reference it as a project the problem does not reproduce. If that's a clue I've missed it...

Answer 1

It's likely that the binary version of zxing.Monotouch is trying to access something that does not exists in 6.0.1. That's uncommon as we try to maintain source/binary compatibility unless the code is really broken (e.g. it would cause a crash anyway). I cannot be more precise without more data (e.g. a full build log).

If you include zxing.Monotouch as a reference then it will be rebuilt. If it works then it really looks like source compatibility was preserved (but not binary compatibility).

Whenever you have the source code available I encourage you to use .csproj (not .dll) references. Is has a few advantages, including the source/binary compatibility (above) and the fact that it makes things easier to debug from your project.