public static void Transition(Activity activity, Android.Support.V4.App.FragmentTransaction fragmentTransaction, int frameResId, Android.Support.V4.App.Fragment fragment)
        {
            InitTransaction(fragmentTransaction);

            fragmentTransaction.Replace(frameResId, fragment);
            fragmentTransaction.Commit();
        }
        public static void StackTransition(Activity activity, Android.Support.V4.App.FragmentTransaction fragmentTransaction, int frameResId, Android.Support.V4.App.Fragment fragment, string tags)
        {
            InitTransaction(fragmentTransaction);

            fragmentTransaction.Replace(frameResId, fragment);
            fragmentTransaction.AddToBackStack(tags);
            fragmentTransaction.Commit();
        }