private static void interstitialDismissCallback(IntPtr interstitialHandlePtr)
{
GCHandle interstitialHandle = (GCHandle)interstitialHandlePtr;
AMRInterstitialViewDelegate delegateObject = interstitialHandle.Target as AMRInterstitialViewDelegate;
delegateObject.didDismissInterstitial();
}
void onAdClosed(string message)
{
delegateObj.didDismissInterstitial();
}