public static void CopyQuizData(this Fragments.IQuiz dest, Fragments.IQuiz copy_data)
{
dest.word = copy_data.word;
dest.mean = copy_data.mean;
dest.sound_path = copy_data.sound_path;
dest.IsDownloaded = copy_data.IsDownloaded;
}
public static void InitQuizData(this Fragments.IQuiz quiz)
{
quiz.word = null;
quiz.mean = null;
quiz.sound_path = null;
quiz.IsDownloaded = false;
}