Xamarin Android Build Failed “Invalid value for outputAssembly”

Question

A few days ago my solution seemed to work fine, but today all of the sudden the Android project doesn\'t build. I get no Error, but I do get the following output:

Answer 1

If you are using the portable class library (PCL) approach to organize your code between Android and iOS, you can unload the Android project by right-clicking it and selecting menu option "Unload Project" in Visual Studio. Then recompile the PCL project, reload the Android project again (right click -> "Reload Project") and rebuild the solution. This time it should give no error. Now try to run the app again on Android emulator.

You may have to also restart the emulator and uninstall the app from the emulator/device before being able to run it succesfully again.