Signed apk doesn't work on my device

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http://stackoverflow.com – I've developped an android application using Xamarin. It works fine on the emulator but crashes on real device. The apk gets installed on the device and on opening the app it says "application has stopped unexpectedly.Please try again" and forces the application to close. Targeting framework, minimum sdk version etc everything is fine but still does not work. Any help will be appreciated. Thanks (HowTos)